This 34T Mod1 Spool Gear allows you to fine tune the gearing of your\nvehicleFEATURES: Strong and durable steel for long-lasting performance in\nextreme RC conditions - Precision manufactured tooth profile for smooth\noperation - Precision manufactured set screw holes for the fit of screws\neither side of the spool shaft for extra secure fit - To fit to 8mm diameter\nshaftYOU WILL RECEIVE: 1 x 34T MOD1 SPOOL GEAR (8mm BORE)2 x M4 x 4mm Set\nScrewDIMENSIONS: bore: 8mmtooth: 1.0 modulustooth face width: 6mmoverall\nwidth: 11mmhub diameter: 16mm