... Product parameter: Pingxiang City Zhongxing Chemical Packing co.ltd is a professional manufacture which produced POM ball. POM ball , ... , oil, acid, alkali, such as performance, high resistance to creep and stress ability, excellent wear resistance, self-lubricity, ... strength changed little. Plastic ball the precision of + / - 0.02 to 0.001 mm, without closing parting line, without burr, smooth ...