Hot Racing Long 9T Steel 24P Pinion Gear 5mm NSG409L 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 NSG409L; UPC 083745568196 This item works with: Associated MTA4, Monster GT, Monster GT 4.6, RC-8 buggy; HPI Electric Savage Flux; HPI Nitro Savage X, Savage X 4.6; Losi 1:8 8ight Nitro, 1:8 LST, LST2, or Aftershock