... size Haining Beyond Seals Co.,Ltd. mainly manufacture rubber parts including rubber stoppers, rubber sleeve seals(O ring, U ring, Y ... the support ring, guide ring, the cushion ring, rubber buffer block,etc.Mainly rubber material are NR, NBR, FKM/VITON/FPM, SI ... and foreign customers.1.Description of products Blind rubber grommet ProductBlind rubber grommet MaterialNR/Silicone/NBR/EPDM/SBR,etc.Hardness40 ...