... disposal, and for floating. Solid ball diameter 1mm--60mm, mainly used in the industry of bearing.2) Plastic balls are ... ball1mm-60mmPP,PE,ABS,POM,PA,PMMATrackball,Ball valve,Bearing ball, Roll on ball,and so onHollow ball10mm- ... 100mmPP,PE,HDPERoll on ball,Bearing ball,Ball valve,Floating ball,and so onRoll ... to receiving your order! 7.9387mm pom plastic solid ball bearing ball