... of Design 3.OEM/ODM service 4.good price Hard Plastic Worms for drive Parameter : 1. Spiral ... your request.3):Certificate: ISO9001:2008 & SGS;4):Aplication:automotive, electronic, telecommunications, mechanical products, ... offer a complete solution for your gear needs, from various plastic gears, gearboxes to complete ... make all kinds of small precision Plastic gears,worms and worm gears according to ...