This FFKM - FFPM O-Ring has a diameter of 25x2.5 mm and is White in color. The hardness of this O-ring 25x2.5 - FFKM - FFPM - F707W94 - FDA - EC1935/2004 - USP Class VI - 3A Sanitary - 70 Shore A - White - ORS216509 is 70. 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 -20 ºC to 250 ºC. O-Rings 555403 are referred to as 216509 and have a DIN 3771 size of 25x2.5. This item is equivalent to and has an FDA - EC1935/2004 - USP Class VI - 3A Sanitary approval. The chemical name of this O-Ring is Perfluorcarbonrubber / Perfluoroelastomeer.