This FFKM - FFPM O-Ring has a diameter of 18.77x1.78 mm and is White in color. The hardness of this O-ring 18,77x1,78 - FFKM - FFPM - F808W95 - FDA - EC1935/2004 - USP Class VI - 3A Sanitary - High Temp. (+300°C) - 80 Shore A - White - ORS91235 is 80. 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 300 ºC. O-Rings 669508 are referred to as 91235 and have a DIN 3771 size of 18.77x1.78. This item is equivalent to and has an FDA - EC1935/2004 - USP Class VI - 3A Sanitary - Hoge Temp. (+300°C) approval. The chemical name of this O-Ring is Perfluorcarbonrubber / Perfluoroelastomeer.