ARRMA Ball Bearing 6x12x4mm 4x4 (2) ARAC3144 is compatible with ARA102666, ARA102668, ARA102694, ARA102694I, ARA102696, ARA102711, ARA102714IT1, ARA102714IT2, ARA102714T1, ARA102714T2, ARA102715T1, ARA102715T2, ARA102720T1, ARA102720T2, ARA102721T1, ARA102721T2, ARA102722, ARA102723, ARA110002T1, ARA110002T2, ARA960GL, ARA960RL, ARA961BL, ARA961RL, ARAD60GL, ARAD60RL, ARAD61BL, ARAD61RL, ARAD64NL, ARAD65GL