... price 2) we are the factory of manufacturing product stainless steel balls for rolling on the bottle1) We are specialize in ... diameter 1mm--60mm, mainly used in the industry of bearing.2) Plastic balls are made of different materials, such as PP, ... nameSpecificationMaterialApplicationSolid ball1mm-60mmPP,PE,ABS,POM,PA,PMMATrackball,Ball valve,Bearing ball, Roll on ball,and so onHollow ball10mm-100mmPP, ...