1, Material: NBR,EPDM,SBR. etc 2, Inserted: Cotton, nylon. etc available on request 3, ... Rubber Insertion sheet 1.Rubber insertion sheet 2.Material:NBR,EPDM,SBR. etc 3.Inserted:Cotton,nylon. etc available on request 4 ... and wear and tear resistance..The material : Natural rubber / SBR, Neoprene, NBR, EPDM,Butyl, Sillicon, Viton etc.Insertion material: Cotton cloth or ...