Hot Racing SRVO436 Steel Spur Gear (36T 1.0 Mod)(Silver) - Traxxas 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 SRVO436; UPC 083745443080 This item works with: Traxxas Revo 3.3 5309