Sterling Seal OREPD444x250 O-Ring, Number-444 Standard is Good for Steam (400 Degree F), Hot Water, Sunlight, Silicone Oils and Greases, EPDM/EPR/EP, 7-3/4" ID, 8-1/4" OD (Pack of 250): Amazon.com: Industrial & Scientific
EPR O- Rings & Seals - EPDM O Rings & Seals - ASTM Standard D-1418 Oring | Rocket Seals, Inc.
217 EPDM FDA 70 DURO - O-RING - Seal & Design Store
Metric EPDM O Rings Rubber- Various ID - 2MM C/S - UK SUPPLIER O Ring Seals | eBay