Hot Racing 18t Steel 32p Pinion Gear 5mm Bore NSG3218 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 NSG3218; UPC 083745587494 This item works with: Associated RC-8e RC8.1e RC-8.2e, RC-8e Truck electric, SC-10 4x4; Axial Yeti XL; Durango DESC410R 1:10 Electric 4WD Short Course Truck, DEX408 1:8 Electric buggy; ECX 1:8 Elec Revenge Buggy; HPI Electric Savage Flux, Vorza 1:8 Buggy Electric; Kyosho Inferno VE electirc; Losi 1:10 SCTE short course, 1:10 XXX-SCT XXX-SCB, 1:8 8ight-E, 1:8 8ight-T 3.0; Traxxas E-Maxx, E-Maxx 3908 Brushless, E-Revo 5603 5605 5608, Summit, XO-1