Fraizoe RC Slipper Clutch Assembly Kit is designed for model car enthusiasts seeking reliable RC upgrades. Material: Aluminum Alloy (for lightweight parts) and Steel Shaft (for durability) Components: Input Shaft (1), Bearings (2), Bearing Adapter (1), Slipper Clutch (1), Spring (1, 2x9.8mm), Pin (1, 5x8mm) Weight: 24g Compatibility: for Traxxas Slash 4X4, Stampede 4X4, Rustler 4X4, Hoss 4X4 Original Part Numbers: 5552, 6878