This is the Extra Hard 26 Tooth 32 Pitch Blackened Finish Pinion Gear from Robinson Racing. FEATURES: Extra hard high carbon construction For use with the Robinson Racing GEN3 steel slipper units Fits 5mm motor shaft YOU WILL RECEIVE: 26 Tooth 32 Pitch Blackened Finish Pinion Gear 4mm Set Screw jxs 12/09/13ir/jxs &