Hot Racing super duty steel mod 1.0 45 tooth spur gear for 1/10th scale Horizon ECX 4wd vehicles. This includes the Circuit stadium truck, Ruckus monster truck, and Torment short course. FEATURES: - steel construction for total reliability when using high power brush-less systems- CNC machined and lightened hardened steel construction- black oxide coating for durability and corrosion resistance- compatible with stock slipper assembly- replaces stock nylon spur gearYOU WILL RECEIVE: - 45 tooth mod 1.0 steel spur gearSPECIFICATIONS: - number of teeth: 45- gear pitch: 1.0 modulus- tooth face width: 0.20 inch (5mm)REQUIREMENTS: - installing in vehicle COMMENTS: - replaces the stock plastic gear: ECX232019 - must use with appropriate hardened steel pinion gear description revised by: DB January 4, 2017