This FFKM - FFPM O-Ring has a diameter of 3.81 x 1.9 mm and is Black in color. The hardness of this O-ring 3.81x1.9 - FFKM - FFPM - F757Z75 - High Temp (>330°) - 75 Shore A - Black - ORS219903 is 75 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 -15 ºC to 340 ºC. O-Rings 592309 are referred to as 219903 and have a DIN 3771 size of 3.81 x 1.9. This item is equivalent to and has an High Temp (>330°) approval. The chemical name of this O-Ring is Perfluoroelastomer.