This FFKM - FFPM O-Ring has a diameter of 158 x 3.5 mm and is Black in color. The hardness of this O-ring 158x3.5 - FFKM - FFPM - F758ZSR - Steam - High Temp. (+330°C) - 75 Shore A - Black - ORS186212 is 75. 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 330 ºC. O-Rings 848906 are referred to as 186212 and have a DIN 3771 size of 158 x 3.5. This item is equivalent to and has an Stoom - Hoge Temp. (+330°C) approval. The chemical name of this O-Ring is Perfluorcarbonrubber / Perfluoroelastomeer.