... : diaphram with rubber,long lifetime Features: MaterialNBR,HNBR, MVQ, NR, EPDM, FKM(VITON),ACM, FMVQ,CR,… , according to customers' requirementsSize According to customer's drawingsHardness30 - 90 ... Strong pointWe have our own mold center, can develop most kinds of high tech required molds. Black rubber diaphragm with good quality