... durable sex. POM poly formaldehyde plastic ball, PA nylon plastic ball, PP polypropylene plastic ball is mainly used in cars, sensor, valves, pumps, valves ... highly precise customers choose! Mainly used in cars, plastic ball valves, pumps, sensor, wei yu, electronic, ball valves, bearings, electric appliances, and ... and you work together to create brilliant! 6.35mm POM ball in high pressure hydraulic