rubber spring 1.spring material:carbon steel;spring steel;stainless steel,alloy steel 2.rubber:EPDM 3.ISO9001 rubber spring1.spring material:carbon steel;spring steel;stainless steel,alloy steel2.rubber:EPDM3.ISO90014.Wire Dia.:1mm-10mm5.We can do OEM.6.Surface treatment:Zinc,Nickel,powder coating.7.Applications: Automotive, medical device, electronics, toy,etc rubber spring