... precision, good surface 2)we are factory and lower price About us Brand NamePlace of OriginStandardxinxinShandong China ( mainland)SGSAbout plastic ball Product ... (Delrin),NYLON,ABS,AS,PP,PE,PVC,PS,PC, TEFLON.....Size 2 - 15 mmIntroduce and Application Plastic balls are deal for light ... is not recommended for use with acids and alkalis.PVC Balls .PVC is the most widely used member of the vinyl family ...