seal products Certificate:ISO 9001:2000 Material:NR,SI,EPDM,NBR, ... Sell):O-rings,U-type loops,Y-type loops,customized rubber itemsMaterial NR, SI, EPDM, NBR, SBR, FPM, IR,, BR, IIR ... our products! Feel free to contact me with any questions! Rubber seal products in different materials and sizes