Volvo B10M Mark III

Deployments

SBS582M (HGDEP 156) - Fragrance Bak Kwa
SBS583K (BNDEP 2) - S: Moove Skyliner
SBS584H (HGDEP 109)
SBS585E (BBDEP 96) - Nokia N Series(Complimentary Wi-Fi Access On This Bus)
SBS586C (HGDEP 109) - B: Nicorette Gum
SBS587A¹ (BBDEP 96)
SBS588Y (BNDEP 28) - Panadol Extra
SBS589U¹ (BBDEP 170)
SBS590P (HGDEP 109)
SBS591L (BNDEP 291) - S: Moove Skyliner
SBS592J (BNDEP 3) - B: KungFu Panda Movie
SBS593G (HGDEP 119) - FS: OCBC Easicredit
SBS594D (BNDEP 69)
SBS595B (HGDEP 82)
SBS596Z (BNDEP 14/14e)
SBS597X (HGDEP 103) - B: Mobil LP Gas
SBS598T (ARBP 175)
SBS599R (BNDEP SP)
SBS600U (HGDEP 163) - DBS Bank: Living, Breathing Asia
SBS601S (HGDEP 109) - LTA Full Day Bus Lanes
SBS602P (BNDEP 291)
SBS603L (BNDEP 38) - Garnier
SBS604J (HGDEP 43) - B: IS2 Interior Design
SBS605G (HGDEP 315)
SBS606D (ARBP 175) - Darlie
SBS607B (BNDEP 40) - B: IS2 Interior Design
SBS608Z (BNDEP 81) - B: King's Footwear - Comfort Range
SBS609X (BNDEP 38) - DBS Bank: Living, Breathing Asia
SBS610R (BNDEP 291) - B: Mobil LP Gas
SBS611M (BNDEP 359) - S: Moove Media
SBS612K (BNDEP 228/CT18)
SBS613H (HGDEP 156) - B: QBB Clarified Butter
SBS614E (BNDEP 291)
SBS615C¹ (BBDEP 170)
SBS616A¹ (BBDEP 170)
SBS617Y¹ (BBDEP 170) - B: King's Footwear - Comfort Range
SBS618U (ARBP 16) - Za Future Defence
SBS619S¹ (BBDEP 170)
SBS620L (HGDEP 147) - Loreal Paris: UV Perfect
SBS621J (HGDEP 372)
SBS622G¹ (BBDEP 170)
SBS623D (HGDEP 103)
SBS624B¹ (BBDEP 170) - B: King's Footwear - Comfort Range
SBS625Z (HGDEP 85) - Be A Grassroot Volunteer
SBS626X (ARBP 195)
SBS627T (BNDEP 293) - Pasta Mania
SBS628R (BNDEP 291) - S: Moove Skyliner
SBS629M (BNDEP 14/14e)
SBS630H (BNDEP 293)
SBS631E (BNDEP 2) - Canon EOS
SBS632C (HGDEP 112) - B: Be A Winner
SBS633A (BNDEP 291) - S: Moove Skyliner
SBS634Y¹ (BBDEP 170)
SBS635U (BNDEP 58) - Za Future Defence
SBS636S¹ (BBDEP 170) - B: Yokohama Drive
SBS637P (BNDEP 31) - Dettol
SBS638L (BNDEP 197)
SBS639J (BNDEP 40) - B: Cold Storage
SBS640D (HGDEP 43) - Downy Fabric Conditioner
SBS641B¹ (BBDEP 96)
SBS642Z¹ (BBDEP 170)
SBS643X (HGDEP 43) - Bosch
SBS644T (BNDEP 197) - Singapore Red Cross: Give Blood Give Life
SBS645R¹ (BBDEP 170)
SBS646M¹ (BBDEP 284)
SBS647K¹ (BBDEP 96)
SBS648H (HGDEP 43) - B: Ambipure Dual
SBS649E¹ (BBDEP 170) - Underwater World
SBS650A (HGDEP 43) - Ginvera Marvel Gel
SBS651Y (BNDEP 359)
SBS652U (HGDEP 43) - B: Be a Winner
SBS653S¹ (BBDEP 170)
SBS654P (BNDEP 14/14e)
SBS655L (HGDEP 43) - SimplyHer Magazine
SBS656J (BNDEP 293)
SBS657G¹ (BBDEP 170)
SBS658D (HGDEP 159) - LTA Full Day Bus Lane
SBS659B (HGDEP 43) - B: Barons
SBS660X (HGDEP 43) - 7-Eleven
SBS661T¹ (BBDEP 170)
SBS662R (HGDEP 163) - Power98 FM
SBS663M (BNDEP 291) - S: Moove Media
SBS664K (BNDEP 40) - B: Practice Window Safety
SBS665H¹ (BBDEP 170)
SBS666E (ARBP 195)
SBS667C (ARBP 16)
SBS668A¹ (BBDEP 96)
SBS669Y (HGDEP 159) - Fresh Look by CIBA Vision (feat Rainie Yang)
SBS670S (HGDEP 112) - B: Ambipure Dual
SBS671P (HGDEP 317)
SBS672L¹ (BBDEP 170)
SBS673J¹ (BBDEP 170)
SBS674G (HGDEP 103)
SBS675D¹ (BBDEP 170)
SBS676B (BNDEP 3)
SBS677Z¹ (BBDEP 170)
SBS678X (HGDEP 315)
SBS679T (BNDEP 2)
SBS680M (HGDEP 113)
SBS681K¹ (BBDEP 170)
SBS682H (HGDEP 163) - Jia 88.3FM
SBS683E¹ (BBDEP 170)
SBS684C¹ (BBDEP 170)
SBS685A¹ (BBDEP 170)
SBS686Y (BNDEP 3)
SBS687U (HGDEP 163) - LTA Full Day Bus Lanes
SBS688S (HGDEP 100) - Esso/Mobil(3rd Gen)
SBS689P (HGDEP 103)
SBS690J¹ (BBDEP 170)
SBS691G (BBDEP 92) - NEA Dengue Fever
SBS692D¹ (BBDEP 170) - Barang Barang Singapore
SBS693B (HGDEP 100) - B: Kungfu Panda
SBS694Z¹ (BBDEP 284)
SBS695X (BNDEP 293)
SBS696T (ARBP 93) - S: Pierre Cardin
SBS697R¹ (BBDEP 170)
SBS698M¹ (BBDEP 170)
SBS699K¹ (BBDEP SP)
SBS700P (HGDEP TRG)
SBS701L (HGDEP TRG)
SBS702J (BNDEP 358)
SBS703G¹ (BBDEP 170)
SBS704D (ARBP 175)
SBS705B¹ (BBDEP 170) - B: JB City Square Chinese New Year Promotion
SBS706Z¹ (BBDEP 170)
SBS707X¹ (BBDEP 160) - B: JB City Square Chinese New Year Promotion
SBS708T¹ (BBDEP 200)
SBS709R¹ (BBDEP 160) - B: Yokohama Drive
SBS710K¹ (BBDEP 170)
SBS711H (BNDEP 293)
SBS712E¹ (BBDEP 170)
SBS713C¹ (BBDEP 170)
SBS714A¹ (BBDEP 160) - B: King's Footwear - Comfort Range
SBS715Y¹ (BBDEP 170) - B: Pere Ocean Drinking Water
SBS716U¹ (BBDEP 170)
SBS717S¹ (BBDEP 160) - B: Avalon (2nd Version)
SBS718P¹ (BBDEP 170)
SBS719L¹ (BBDEP 160) - B: JB City Square Chinese New Year Promotion
SBS720G (BNDEP 39) - Taka Jewellery: Love Series
SBS721D (BNDEP 17) - LTA Full-Day Bus Lane
SBS722B¹ (BBDEP 285)
SBS723Z (HGDEP 325)
SBS724X (BNDEP 28) - B: F&N aLIVE
SBS725T¹ (BBDEP 285)
SBS726R (BNDEP 293) - B: Avalon
SBS727M (HGDEP 159) - B: Aquera
SBS728K¹ (BBDEP 285)
SBS729H (BNDEP 2) - Hp Colour Series
SBS730C (BNDEP 359) - LS: Empty + RS: Moove Skyliner
SBS731A¹ (BBDEP 160)
SBS732Y (HGDEP 112) - DBS Bank
SBS733U¹ (BBDEP 96)
SBS734S¹ (BBDEP 160)
SBS735P (HGDEP 315) - B: Mobil LP Gas
SBS736L (BNDEP 3) - 7-Eleven: Buy $5 & Get a Free Magnet (New Gen: Lime green)
SBS737J¹ (BBDEP 96)
SBS738G¹ (BBDEP 96)
SBS739D¹ (BBDEP 160)
SBS740Z (BNDEP 197)
SBS741X (ARBP 16) - Dance Of The Dragon
SBS742T (BBDEP 151) - B: QBB: Clarified Butter
SBS743R (ARBP 195) - IDD 1526
SBS744M (HGDEP 113)
SBS745K (ARBP 195)
SBS746H¹ (BBDEP SP)
SBS747E (ARBP 195)
SBS748C (ARBP 16/409) - Alsace In France
SBS749A (BNDEP 3) - B: KungFu Panda Movie
SBS750U (HGDEP 325)
SBS751S (BBDEP 151) - Standard Chartered
SBS752P (BNDEP 39) - Esso Mobil(3rd Gen)
SBS753L (ARBP 95) - B: Learning Hub @ Biopolis
SBS754J (HGDEP 325)
SBS755G (ARBP 16) - L'ORÉAL PARIS: ELSÉVE
SBS756D (ARBP 16) - Leica D-Lux 3
SBS757B (BNDEP 293) - One Week Deodorant (Neon Green)
SBS758Z¹ (BBDEP SP)
SBS759X (ARBP 95) - A*Star
SBS760R (BNDEP 3) - B: Baron Beer
SBS761M (ARBP 16) - The Furniture Mall
SBS762K (ARBP 273) - Pantene
SBS763H (HGDEP TRG)
SBS764E (BNDEP 293)
SBS765C (HGDEP 103)
SBS766A (ARBP 273) - B: Canon Pixma Printers
SBS767Y (ARBP 272) - B: Be A Winner
SBS768U¹ (BBDEP 170)
SBS769S (HGDEP 103) - DBS Bank
SBS770L (BNDEP 40)
SBS771J (BNDEP 69) - S: Moove Skyliner
SBS772G (HGDEP TRG)
SBS773D (BNDEP 37/579*)
SBS774B (HGDEP TRG)
SBS775Z (HGDEP 317)
SBS776X (BNDEP 18) - DBS Bank
SBS777T (HGDEP TRG)
SBS778R (BNDEP 291) - Singapore Deposit Insurance Corporation SDIC
SBS779M¹ (BBDEP 170) - Left & Right: Hi Chews; Rear: Dars
SBS780H (BNDEP 2) - B: You Don't Mess With the Zohan Movie
SBS781E (BNDEP 109)
SBS782C¹ (BBDEP 170)
SBS783A (ARBP 95) - B: Science.07
SBS784Y¹ (BBDEP 170)
SBS785U¹ (BBDEP 160)
SBS786S¹ (BBDEP 160)
SBS787P¹ (BBDEP 170) - IFC
SBS788L (HGDEP 43)
SBS789J¹ (BBDEP 160)
SBS790D (BNDEP 291) - NEA - They Breed, You Bleed
SBS791B (BNDEP 40)
SBS792Z (HGDEP 101)
SBS793X (ARBP 175) - DBS Bank
SBS794T (BNDEP 518/518B) - Amaron
SBS795R¹ (BBDEP 160)
SBS796M¹ (BBDEP 160)
SBS797K (HGDEP 159) - B: Be A Winner
SBS798H (ARBP 16) - Men's Biore
SBS799E¹ (BBDEP 96)
SBS800J¹ (BBDEP 170) - B: JB City Square Chinese New Year Promotion
SBS801G (HGDEP 113) - B: Mobil LP Gas
SBS802D (ARBP 16) - Garnier
SBS803B (HGDEP 315)
SBS804Z (HGDEP 113)
SBS805X (BNDEP 40)
SBS806T (HGDEP 156) - Panadol Extra
SBS807R (BNDEP 31)
SBS808M (BNDEP 358)
SBS809K (BNDEP 291) - DBS Bank
SBS810E (HGDEP 112) - Esso
SBS811C (HGDEP 103)
SBS812A (HGDEP 109) - B: Listerine Mouthwash: Cool Mint
SBS813Y (BNDEP 291) - B: Ginvera
SBS814U (HGDEP 315/317) [With Volvo B10M Mark II (DM) Front Grille & Bumper]
SBS815S (HGDEP 325) - BS: Give Way To Buses
SBS816P (BNDEP 228/229/CT18)
SBS817L¹ (ARBP 95)
SBS818J¹ (BBDEP 96)
SBS819G (BNDEP CT18/225W)
SBS820B (ARBP 195) - B: KungFu Panda Movie
SBS821Z (ARBP 175) - MasterCard
SBS822X (BBDEP 7) - Drugs: If You Play, You Pay - By NewUrbanMale & National Council Against Drug Abuse
SBS823T (BBDEP 96) - Ciba Vison Dailies Lenses
SBS824R (ARBP 16) - Burger King Tendergrill
SBS825M (HGDEP 85) - LTA Full Day Bus Lanes
SBS826K (BNDEP 3) - S: Rabowarrant
SBS827H (BNDEP 293) - B: Ginvera Nutri White Marvel Gel
SBS828E¹ (BBDEP SP)
SBS829C¹ (BBDEP SP)
SBS830Y (BNDEP 17) - Olympus µ850 SW
SBS831U (ARBP 195) - Seiko Criteria (feat. Daniel Wu)
SBS832S (ARBP 195)
SBS833P (BBDEP 96) - S: Moove Skyliner
SBS834L (ARBP 273)
SBS835J (ARBP 195) - Darlie
SBS836G (ARBP 16) - Subway
SBS837D (HGDEP TRG) - S: Moove Media
SBS838B (ARBP 16) - Prominius
SBS839Z (ARBP 16) - Elizabeth Arden White Glove Skincare
SBS840T (ARBP 16) - Bridgestone Potenza
SBS841R (BNDEP 359) - B: Mobil LP-Gas
SBS842M (HGDEP 85)
SBS843K (BBDEP 165) - B: Dennis Wee Group
SBS844H (ARBP 195)
SBS845E¹ (BBDEP SP)
SBS846C (ARBP 16) - Shine @ Work
SBS847A (HGDEP 100) - Appeton Activ-C
SBS848Y (BNDEP 291)
SBS849U (HGDEP 103)
SBS850P (HGDEP 151)
SBS851L (BNDEP 81)
SBS852J (BNDEP 3) - Golden Village Cinemas: Watch, Scratch & Win
SBS853G (BNDEP 5) - Esso (New Gen)
SBS854D (BBDEP 96)
SBS855B (HGDEP 113) - BS: Give Way To Buses
SBS856Z (BNDEP 197) - Poh Heng: Baby Disney Collection
SBS857X (BNDEP CT18/225G)
SBS858T (BNDEP 359) - DBS Bank
SBS859R (ARBP 16) - Esso Mobil (3rd Gen)
SBS860K (ARBP 195) - Barang Barang Singapore
SBS861H (ARBP 195) - DBS Bank
SBS862E (ARBP 195) - SK Novi Collection
SBS863C (HGDEP 113)- LTA Full Day Bus Lanes
SBS864A (ARBP 16) - TGC
SBS865Y (ARBP 91/91A)
SBS866U (BNDEP 2) - DBS Bank
SBS867S (HGDEP 372)
SBS868P (HGDEP 101)
SBS869L (BNDEP 38) - NEA - They Breed, You Bleed
SBS870G (BNDEP 359)
SBS871D¹ (BBDEP 151)
SBS872B (HGDEP 325)
SBS873Z (BNDEP 2) - Guinness 9 Ball Tour: The Giants Of Pool
SBS874X (BNDEP 197) - FS: rednano.sg
SBS875T (HGDEP 85) - NEA - They Breed, You Bleed
SBS876R (BNDEP 31) - Downy Fabric Conditioner: Relaxing Rose
SBS877M¹ (BBDEP SP)
SBS878K (ARBP 16) - L’Oréal UV Perfect
SBS879H (BNDEP 358)
SBS880C (HGDEP 109)
SBS881A (BNDEP 293) - NEA - They Breed, You Bleed

Former Deployments

SBS583K: BNDEP 17 , BNDEP SP , BNDEP 291
SBS584H: HGDEP SP
SBS585E: ARBP 274 , HGDEP SP
SBS586C: HGDEP 116, HGDEP SP , ARBP 274 , HGDEP SP
SBS587A: BBDEP 274 , BBDEP 170 , BNDEP 28
SBS590P: HGDEP SP , ARBP 96
SBS593G: HGDEP SP
SBS594D: BNDEP 38
SBS595B: HGDEP 197 , HGDEP 89/89e, HGDEP SP , ARBP SP , HGDEP SP
SBS597X: HGDEP 89/89e
SBS598T: ARBP 274
SBS599R: BNDEP 38
SBS601S: AMDEP 52, AMDEP SP, HGDEP SP
SBS602P: BNDEP 19
SBS604J: HGDEP 147 , HGDEP 32
SBS605G: HGDEP 66
SBS606D: HGDEP 89 , HGDEP SP
SBS608Z: BNDEP SP , BNDEP 69
SBS609X: BNDEP 38/37*
SBS620L: HGDEP 32
SBS621J: HGDEP 85 , HGDEP SP , HGDEP 371
SBS623D: HGDEP 85 , HGDEP SP
SBS625Z: HGDEP SP
SBS632C: HGDEP 85 , HGDEP SP , HGDEP 32
SBS633A: BNDEP 31
SBS635U: BNDEP SP , BNDEP 31 , BNDEP 291
SBS637P: BNDEP 291
SBS638L: HGDEP 197
SBS641B: BBDEP SP , BBDEP 170
SBS643X: HGDEP SP , HGDEP 32
SBS644T: HGDEP 32, HGDEP 147
SBS646M: BBDEP 170
SBS647K: BBDEP 170
SBS648H: HGDEP SP
SBS650A: HGDEP SP
SBS651Y: BNDEP 19
SBS652U: HGDEP SP
SBS655L: HGDEP SP
SBS656J: BNDEP SP , BNDEP 5 , BNDEP 28
SBS658D: HGDEP 32
SBS659B: HGDEP SP
SBS660X: HGDEP SP
SBS662R: HGDEP 112 , HGDEP 100 , HGDEP SP
SBS668A: BBDEP 170
SBS669Y: HGDEP SP , HGDEP 51 , HGDEP 119 , HGDEP 372
SBS670S: HGDEP 163 , HGDEP 315 , HGDEP 89
SBS671P: HGDEP 100 , HGDEP SP
SBS674G: HGDEP 100
SBS678X: HGDEP SP, HGDEP 34
SBS680M: HGDEP SP, HGDEP 34
SBS689P: HGDEP 34 , HGDEP SP
SBS690J: HGDEP SP
SBS691G: ARBP SP , BBDEP 7 , HGDEP 7
SBS694Z: BNDEP 293 , BBDEP 170 , BBDEP 274
SBS696T: BNDEP SP , BBDEP 96 , ARBP 96
SBS700P: BNDEP SP , BNDEP 293 , BNDEP 19 , BNDEP 68
SBS701L: BNDEP 18
SBS703G: BNDEP SP
SBS704D: BNDEP 293 , HGDEP 197
SBS708T: BBDEP SP
SBS716U: BNDEP 69
SBS719L: HGDEP SP
SBS720G: BNDEP 3
SBS721D: BNDEP 293 , BNDEP SP
SBS722B: BNDEP 293 , BBDEP SP
SBS723Z: BNDEP 293 , HGDEP 34 , HGDEP SP
SBS724X: BNDEP 293
SBS725T: BBDEP SP
SBS726R: BNDEP 14
SBS727M: HGDEP 32
SBS728K: BBDEP SP
SBS732Y: HGDEP SP , HGDEP 197
SBS733U: BBDEP SP
SBS735P: HGDEP 32, HGDEP 100
SBS737J: BBDEP SP , BBDEP 170 , BNDEP 357
SBS738G: BBDEP SP
SBS740Z: ARBP 175 , ARBP 274 , ARBP 96, HGDEP 197
SBS742T: ARBP 96
SBS744M: HGDEP SP, HGDEP 34
SBS746H: BBDEP 170
SBS749A: BNDEP 357
SBS751S: ARBP 96
SBS752P: AMDEP 39 , BNDEP 39
SBS757B: BNDEP 40
SBS758Z: ARBP 95 , BBDEP SP , BBDEP 170
SBS760R: BNDEP 357
SBS762K: ARBP 95 , ARBP 16
SBS763H: ARBP 272 , ARBP 96
SBS765C: HGDEP 100 , HGDEP SP , HGDEP 119
SBS766A: ARBP 96
SBS767Y: ARBP 95
SBS769S: HGDEP 34
SBS772G: ARBP 95 , BBDEP 284 , ABRP 96
SBS773D: BNDEP 28/579*
SBS775Z: HGDEP SP , HGDEP 100
SBS781E: BNDEP 31
SBS783A: BBDEP 96 , ARBP 96
SBS788L: HGDEP 315
SBS790D: BNDEP 293
SBS792Z: HGDEP 89
SBS796M: HGDEP 154
SBS797K: HGDEP 159
SBS799E: BBDEP SP , BBDEP 170
SBS801G: HGDEP 89/89e , HGDEP 315
SBS802D: ARBP 95
SBS804Z: HGDEP 34
SBS805X: BNDEP 293 , BNDEP 291
SBS810E: HGDEP 100 , BNDEP 291
SBS811C: HGDEP 372
SBS812A: ARBP 96, HGDEP SP
SBS815S: HGDEP SP , HGDEP 89/89e , HGDEP 89
SBS817L: ARBP 16 , BBDEP SP
SBS818J: ARBP 16 , BBDEP SP
SBS821Z: BBDEP 92 , ARBP 96
SBS822X: BBDEP SP , BBDEP 7 , BBDEP 284 , ARBP 96
SBS823T: ARBP 96
SBS825M: HGDEP 315
SBS826K: BNDEP 69
SBS828E: ARBP 95 , BBDEP 160 , BBDEP SP
SBS829C: ARBP 95 , BBDEP SP
SBS830Y: BNDEP 2
SBS833P: ARBP 96
SBS837D: BNDEP 69, BNDEP SP
SBS841R: BNDEP 32
SBS842M: HGDEP 89
SBS843K: HGDEP 165
SBS845E: ARBP 95 , BBDEP SP
SBS847A: AMDEP 39 , BNDEP 39
SBS848Y: BNDEP 31
SBS849U: HGDEP 89/89e , HGDEP 83
SBS850P: HGDEP 34
SBS851L: BNDEP 69
SBS852J: ARBP 16 , ARBP 96, BNDEP 39
SBS853G: BNDEP 28
SBS855B: HGDEP 89/89e , HGDEP 101
SBS856Z: HGDEP 197
SBS863C: HGDEP 147/532* , HGDEP 43 , HGDEP 89
SBS865Y: BBDEP 165 , HGDEP 165
SBS866U: BNDEP 69
SBS867S: BNDEP 69
SBS868P: BNDEP 69
SBS869L: BNDEP 69 , BNDEP 33
SBS871D: BBDEP SP
SBS872B: HGDEP SP, HGDEP 119, HGDEP 34
SBS874Z: HGDEP 197
SBS875T: BNDEP 69 , HGDEP 89
SBS876R: BNDEP 69 , BNDEP SP , BNDEP 31
SBS879H: BNDEP 69
SBS880C: HGDEP SP , ARBP 96

Legend & Notes

Legend

• ARBP - Ayer Rajah Bus Park
• BBDEP - Bukit Batok Depot
• BNDEP - Bedok North Depot
• HGDEP - Hougang Depot
• SP - Spare Buses
• ¹ - JB-registered buses
• Due to complexity of some ads, advertisement codes are present
• (empty): Whole bus ad
• LS: Left Skyliner
• RS: Right Skyliner
• B: Back - Ad covering entire back of bus
• BS: Back Small - Small sticker ad on the back of the bus/ad mounted on the metal holder on the back of bus
• NS: Nearside - Small sticker ad, or ad mounted on the nearside (door) metal ad holder
• OS: Offside (as above, but on driver side)
• S: 2D side ads
• FS: Whole bus ad with 2D side ads
• B3: Full back ad with 3D ads
• F3: Whole bus ad with 3D rear ads

Notes

• SBS760R & 2 of 293's MK3's will operate on 23 during weekends
• SBS721D Crossovers To Svc 12 During Weekdays PM Peak Hours
• BBDEP JB-registered MKIII Spare Buses may appear on 160 or 170
• Voith Gearbox: All except SBS876R, SBS877M & SBS881A; ZF Gearbox: SBS876R, SBS877M, SBS881A
• SBS816P will do 228 on AM Peak and 229 on PM peak
• ARBP & BBDEP buses are interchangable