Plastic gears&gearbox series:Spur Gears, Pinion Gears, Motor Gears, Helical Gears, Crown Gears, Clutch Gears, Quiet Gears, Bevel Gears, Worm & Worm Gears, Pulley, Gear Racks, Special Customized Gears, etc.Service: plastic injection, tooling, assemble.