Durable: RC Car Joint Shaft Transmission, Made of metal, which is more durable and sturdy, practical. RC Car Replacement: Universal Joint Drive Drive Shaft is nice replacements for your old or broken parts. Size: RC car accessory, The diameter of the universal joint is 12mm, the diameter of the central shaft is 9mm, and the inner diameter of the hole is 5mm. Applicable Model RC car upgrade parts, perfect for SCX10 CRAWLER 1/10 RC Car. Fine Workmanship: Drive shaft is Cross universal joint structure, internal drive design. Size Chart: Style A hole to hole:6cm-7.5cm/2.36inchx2.95inch total length:6.8cm-8.6cm/2.68inchx3.39inch Style B to hole:7.5cm-9.6cm/2.95inchx3.78inchtotal length:8.4cm-10.2cm/3.31inchx4.02inch Style Chole to hole:8.6cm-11.5cm/3.39inchx4.53inch total length:9.4cm-11.9cm/3.70inchx4.69inch Style D:hole to hole:9.6cm-13cm/3.78inchx5.12inchtotal length:10.4cm-13.9cm/4.09inchx5.47inch Style E:hole to hole:11.2cm-16cm/4.41inchx6.30inchtotal length:11.9cm-15.9cm/4.69inchx6.26inch Style F:hole to hole:12.1cm-17.5cm/4.76inchx6.89inchtotal length:12.9cm-17.9cm/5.08inchx7.05inch Package Includes: 1 RCJoint Shaft Transmission 2 M4 screws Note: Please allow slightly errors due to manual measurement and different monitors.