31T Mod-1 Steel Spur Gear.**NEW * FOH * SPUR GEARS**BUILT TOUGHFOR HIGH SPEED RUNS AND DRAG RACING APPLICATIONS. Fits ALL CARS WITH REVO STYLE SETUPS, GT CARS, PAN CARS, OFNA, MUGEN, TRAXXAS, LOSI, ARRMA, HPI, HOBAO, CAPRICORN, XRAY, SERPENTS ETC.Machined and Hardened Steel for maximum performance and top speedTHIS PRODUCT SHIPS Worldwide. THANK YOU.