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