... resistant, aging resistant, acid and alkaline resistant, shock absorption, insulation etc..ToleranceAs per your request or ISO2768M, ISO3302Raw materialZeon, Bayer ... and advanced production equipments.The superority of Guangzhou Best Rubber&Plastic Co.,LTD.1.advanced equipments2.professional technical personnel3 ... you will trust we will be your reliable supplier. Foam NBR rubber Special Seats/Products