Amazon.com: Hot Racing SDMD45M06 Steel Spur Gear 45t Bx/Mt/Sc4.18 .6 Module : Toys & Games
Amazon.com: Hobbypark Steel Metal Mod 0.6 Module Pinion Gear Set 3.175mm Motor Gears 17T 21T 26T 29T 11189 11176 11181 11119 for RC Car Redcat HSP Exceed (4-Pack) : Toys & Games
Precision spur gear made of steel 16MnCr5 module 1 18 teeth bore 8mm hardened and ground outside diameter 20mm: Amazon.com: Industrial & Scientific
Newsmarts 45 Steel Spur Gear, 12 Teeth 4mm Bore 1 Module Motor Metal Gear: Amazon.com: Industrial & Scientific