POM worm gear 1.material:POM 2.MOQ :5000pieces 3.ISO9001:2008,ROHS certification 4.plastic gears for machine transmission POM Worm Gear /specilized gear manufactorySurface: as your requirementMaterial: steel / aluminum / brass / iron / zinc / alloyAny other material and dimension depends on customers' demand. Usage: machinery / furniture / toy / massage chair /electric curtain /coffe ...