This FFKM - FFPM O-Ring has a diameter of 230x3 mm and is Black in color. The hardness of this O-ring 230x3 - FFKM - FFPM - F707Z94 - FDA - EC1935/2004 - USP Class VI - 3A Sanitary - 70 Shore A - Black - ORS91048 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 -25 ºC to 275 ºC. O-Rings 663956 are referred to as 91048 and have a DIN 3771 size of 230x3. 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.