... ball seal with mental bone: 1.Material: NBR, EPDM, SBR 2.Rubber thickness: 5mm to 10mm, Diameter; From 30mm to 300mm. rubber ball ... seal with mental bone :1. Rubber ball with metal bone, rubber thickness: 5mm to 10mm, Diameter ... 300mm.Material: NBR, EPDM, SBR, NR.We also can make with NR, BR, IIR, PU.3. Hardness from 35ShA to 85 ...