ISO9001/14001 CE.ROHS.CCC More than 10years experience in gearbox area. Developing time:25Days. HOUSING Material: CopperReduction ratio: i:10,i:20,i:35,i:54,i:104,i:135,i:298,i:315Typical applications:High-end children's toys, audio-visual products, USB fan, shaking his head fan, baby toys, motor vehicles, robot arms, automatic door locks, model aircraft landing gear, adult products, etc.;