... )Material:EPDM,CR.2)Application:Mainly used in marine hatch cover.3)Watertight or oiltight hollow rubber seal.4)Different ... .Material:EPDM,CR.2.Application:Mainly used in marine hatch cover.3.Colour:Black.4.Watertight or oiltight hollow rubber ... Seals Co.Ltd specializes in manufacturing engineering rubber products,marine hatch cover rubber packing (sponge and solid),shipping facilities rubber products ...