Amazon.com: SUOFEILAIMU-MI CS3.53mm EPDM O Ring ID 31.34/32.92/34.52/36.09/37.69x3.53 mm O-Ring Gasket Seal Exhaust Mount Rubber Insulator Grommet 50PCS ORING (Size : ID44.04x3.53mm) : Industrial & Scientific
Is EPDM rubber or nitrile rubber better for 'O' rings?