This is the Traxxas 24 Tooth Steel Clutch Bell. This clutch bell attaches to the adapter unit on the crankshaft, makes contact with the clutch shoes and meshes with the main gear. FEATURES: Fits all Traxxas 1/10 scale nitro vehicles including the 3.3 version of the T-Maxx Constructed of hardened steel INCLUDES: One Traxxas 24 Tooth Steel Clutch Bell Two 5mm x 8mm 0.5mm fiber washers Two 5mm E-clips REQUIRES: Disassembly of flywheel, clutch shoes, and adapter unit. Two 5mm x 11mm bearings, DTXC1547 jxs 4/13/06 ir/jxs BOX DIMENSIONS: 2.50" W. X .75" H. X 3.13" L. BOX WEIGHT: .05 LBS.