... rubber flap: 1.Material: NBR, EPDM, SBR 2.Rubber thickness: 5mm to 10mm, Diameter; From 30mm to 300mm. VALVE rubber flap HS CODE:848190101. Rubber ... ball with metal bone, rubber thickness: 5mm to 10mm, ... 300mm.Material: NBR, EPDM, SBR.2. Solid rubber ballDiameter; From 30mm to 300mm.Material: NBR, EPDM ... 35ShA to 85 ShA. VALVE rubber flap