... quality, performance, safety and reliability. Product nameSpecificationMaterialApplicationSolid ball3.5mm-55mmPP,PE,ABS,POM,PA,PMMATrackball,Ball valve,Bearing ball, Roll on ... ball,and so onHollow ball9.5mm-100mmPP,PE,HDPERoll on ball,Bearing ball,Ball valve,Floating ball,and ... me.My name is Jane,welcome to chat with me. 12.7mm POM Solid Balls