... factory of manufacturing products. 8mm AISI304HC stainless steel roll on ball1) we are specialize in producing stainless steel balls. The balls have good surface,and ... ,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 on ball and holder8mm, 10mm,19.05mm,25 ...