plastic worm for massager,electric toys 1.material:POM,nylon,PA66, ... Tolerance:+/-0.01mm 3.certification:ISO9001:2008 E-936H Plastic Worm Place of OriginGuandong China(Mainland)Machine TypePlastic Injection MouldProduct MaterialPOM ... , plastic gears,plastic worms,plastic worm gears,gear boxes, worm, worm wheel gear,worm gear box,worm gearbox ,gear reducers,worm wheel,Planetary gear,small modulus gears ...