This is the Arrma 48 Pitch, 22 Tooth Pinion Gear. FEATURES: Stock replacement pinion gear for the Arrma Raider and ADX10, optional for the Arrma Vortex, Granite, Fury and Mojave Steel construction INCLUDES: Arrma 48 Pitch, 22 Tooth Pinion Gear with Set Screw jxs 12/19/11 ir/jxs