... rubber washers, etc.Natural Rubber Washers SizeMaterialDuroColoras per your sizeNR40~80 Shore ABlack, RedNR Properties for referenceAdvantage: flexibility, high tensile ... good, and low heat resistance.Operating Temperature: about -60°C~+80°CApplication: tyre, rubber shoes, rubber sac, rubber belt, the ... , elastomerdiaphragm, molded products.Natural Rubber Washers as below, Duro 80, Color: red