Enter ID, OD & Thickness of Rubber Washer / Gasket to get weight of the product Inner Diameter (ID): mm Outer Diameter (OD): mm Thickness: mm Specific Gravity: g/cc     Recommended Specific Gravity (g/cc) for Rubber Materials, NBR – 1.20, EPDM – 1.10, FKM – 1.80, Flourosilicone – 1.40, Neoprene – 1.25, Silicone –