Tamiya #54578 06 H. Coated Alu. Pinion 25T for most RC cars Made by Tamiya; Tamiya is a Japan based company; parts are sourced from Global producers Tamiya part number 54578 This item works with: Associated B44.x, RC-10 B4.x, RC-10 B5 and B5M, RC-10 original aluminum chassis, RC-10 T4.x, RC-10 T5, SC-10 2WD, SC10B Buggy, TC-3 Electric Sedan, ; Losi 1:10 TLR 22SCT, ; Racers Edge Edge Pro2 Short Course, ; Vaterra Ascender 1:10 Chevrolet K5 Blazer , Ford Raptor Pre Runner 1:10th 4WD RTR, Glamis Uno, Halix, Rally 1:10, Slick Rock, Twin Hammers 1.9 Rock Racer RTR, V100 4WD on-road