This FFKM - FFPM O-Ring has a diameter of 53.09x3 mm and is Black in color. The hardness of this O-ring 53.09x3 - FFKM - FFPM - F909ZED - AED - Norsok M710 - 90 Shore A - Black - ORS66955 is 90. Alternative names for the compound are FFKM – FFPM, and it is commonly produced by Kalrez® | Simriz® | Chemraz® | Perlast® | Isolast® | Parofluor®. The O-Ring is typically used in and has an operating temperature range from -15 ºC to 275 ºC. O-Rings 541783 are referred to as 66955 and have a DIN 3771 size of 53.09x3. This item is equivalent to and has an AED - Norsok M710 approval. The chemical name of this O-Ring is Perfluorcarbonrubber / Perfluoroelastomeer.