... ,acid-resistance 4.OEM/ODM serve ACM rubber product with black colour 1,Material: EPDM, NBR, CR, 2,Hardness :60 -- 70A 3 ... abrasion performancelow friction rubber mat /high pressure rubber pump parts: 1,material :EPDM,NBR,CR NR, SBR, BR, EPDM, IIR, silicone ...