This FFKM - FFPM O-Ring has a diameter of 158.3x3.53 mm and is White in color. The hardness of this O-ring 158.3x3.53 - FFKM - FFPM - F707W94 - FDA - EC1935/2004 - USP Class VI - 3A Sanitary - 70 Shore A - White - ORS178990 is 70 Shore A. Alternative names for the compound are FFKM – FFPM, and it is commonly produced by . The O-Ring is typically used in and has an operating temperature range from -20 ºC to 270 ºC. O-Rings 558187 are referred to as 178990 and have a DIN 3771 size of 158.3x3.53. 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 Perfluoroelastomer.