Is EPDM rubber or nitrile rubber better for 'O' rings?
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O-ring For Mechanical Seals Use (material: Vit/nbr/epdm) 40/45/50/55mm 15.8*3.1mm O-rings |spare Parts For Mechanical Seals - Oil Seals & Other Seals - AliExpress
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O-Ring and Rubber Seal Materials: NBR, FKM, EPDM | Pegasus Auto Racing Supplies
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