Here are all the options parts for the Xray XT4.2
Reference 06930815
Brand: XRAY
BALL-BEARING 8x14x4 STEEL SEALED - OIL (2) - 930815
Reference 06325123
Brand: XRAY
ACTIVE DIFF SEGMENT 60° (2) - 325123
Reference 06930508
Brand: XRAY
BALL-BEARING 5x8x2.5 STEEL SEALED - OIL (2) - 930508