1.Rubber air spring be made of NBR,NR,EPDM... 2.Quality ... 3.OEM is welcome 4.Price:negotiable 1.Rubber air spring is applied in Automotive, medical device, electronics, toy, ... etc, just as your request.CertificationISO 9001:2000,TS/16949,ISO14001,SGS, etcSizeaccording to your drawingsColorBlackPackage100 pcs/bag, or customizedQC/ ... Requirement2.Designs and Specification are Accepted rubber air spring