The floating ball mainly use in water treatment. The size from ... are available Them material is PP or HDPE The floating ball is a kind of surface covering ball.It ... has the gravity and stability.The floating ball side and side overlap,the coverage efficiency and ... ball10mm-100mmPP,PE,HDPERoll on ball,Bearing ball,Ball valve,Floating ball,and so onRoll on ball and holder8mm, 10mm ...