... 2. QA Equipment 3.OEM/ODM 4.rubber diaphragm for pump industrial NBR rubber diaphragm for pump Product Namerubber diaphragm for pumpCertificateISO9001:2000Country of OriginChinaAdvantageA. Ozone and chemical ... or samplesMatetialNBR, NR, FPM ,EPDM ,SBR ,SR ,CR, HNBR, IIR, PTFE, Silicon, etc. Can choose on your requirement;Color Black, red ...