Hot Racing 24t Steel Mod 1 Pinion Gear 5mm NSG24M1 Made by Hot Racing; Hot Racing is a United States based company; parts are sourced from Chinese producers All Hot Racing upgrade parts are direct replacements for stock components; additional parts are not required Hot Racing part number NSG24M1; UPC 083745676327 This item works with: Associated RC-8 buggy, RC-8 Truck; HPI Electric Apache C1 or SC, Super 5SC Flux RTR; Losi 1:8 8ight-E; Traxxas XO-1