... request 3, Surface :Smooth , fabric pattern etc Rubber Insertion sheet 1.Rubber insertion sheet 2.Material:NBR,EPDM,SBR. etc 3.Inserted:Cotton ... load distribution and wear and tear resistance..The material : Natural rubber / SBR, Neoprene, NBR, EPDM,Butyl, Sillicon, Viton etc.Insertion ... .2g/cm3 to 1.7g/cm3Handness:40 to 80 shore ATensile strgth:from 2mpa to 10mpa Cloth impregnated black rubber sheet