Hot Racing Arrma 4x4 BLX Steel 0.8MOD Spur Gear (57T)This is a Hot Racing 57T Arrma 4x4 BLX Steel 0. 8MOD Spur Gear, an optional steel Spur Gear for many Arrma vehicles. Features: Rugged 32 pitch (0. 8 module) for total reliability when using high power brushless systems CNC machined and lightened hardened steel construction Replaces factory plastic gear Black oxide coating for durability and corrosion resistance Can uses factory slipper pads (AR310790) (AR310908) or Hot Racing ATF15H ATF15HN aluminum