[Compatibility]Suit for 1/10 Arrma Senton slipper clutch Granite slipper clutch Vorteks slipper clutch Big Rock slipper clutch 1/8 slipper clutch. (Notice: Not with Arrma 6S/550 vehicle). [57T Spur Specification]Upgrade Replace ARA310949 Slipper Clutch, 57-tooth (0.8 metric pitch, with 32-pitch). [Steel Spur ]The is made of hardened metal Steel, with strong wear resistance and long service life. [Work Smoothly]Good machining made less rough and less noise than other pinions make roll smoothly. Material: Metal colour: as shown Package Contents: 1 x 57T 0.8Mod Slipper Clutch Spur Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.