Hot Racing 17t 0.5 Mod Hardened Steel Pinion Gear 1/8 Bore CSG17M05 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 CSG17M05; UPC 083745922295 This item works with: Losi 1:14 Mini 8ight 4WD buggy, 1:18 8ight-T truggy; Vaterra Kalahari 1:14, Kemora 1:14