Cable code:821-00318 821-00510 821-00171, all is same, just different codeCable condition:NewCompatible for MacBook (Retina, 12-inch, Early 2015)
Model Number: A1534
Order Number: MF855LL/A , MF865LL/A , MK4M2LL/A,MJY32LL/A,MK4N2LL/A or MJY42LL/A
Model Identifier: MacBook 8,1
EMC Number: 2746
(Notes: This model has three color options: gold, silver, and space gray. )

Compatible for MacBook (Retina, 12-inch, Early 2016)
Model Number:
Order Number: MLHA2LL/A ,MLH72LL/A ,MLHE2LL/A ,MLHC2LL/A ,MMGL2LL/A, MLH82LL/A ,MLHF2LL/A ,MMGM2LL/A orBTO/CTO
Model Identifier: MacBook9,1
EMC Number: 2991
Notes: This model has four color options: gold, rose gold, silver, and space gray.

Compatible for MacBook (Retina, 12-inch, 2017)
Model Number: A1534
Order Number: MNYF2LL/A or MNYG2LL/A or BTO/CTO
Model Identifier: MacBook10,1
EMC Number: 3099
Notes: This model has four color options: gold, rose gold, silver, and space gray.