This FFKM - FFPM O-Ring has a diameter of 18.77x1.78 mm and is Black in color. The hardness of this O-ring 18.77x1.78 - FFKM - FFPM - F909Z94 - Low Temp (>-30°C) - 90 Shore A - Black - ORS232981 is 90 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 -30 ºC to 260 ºC. O-Rings 951532 are referred to as 232981 and have a DIN 3771 size of 18.77x1.78. This item is equivalent to and has an Low Temp (>-30°C) approval. The chemical name of this O-Ring is Perfluoroelastomer.