This FFKM - FFPM O-Ring is 7.5x3.5mm and in the color White. The Hardness of this O-ring 7.5x3.5 - FFKM - FFPM - High Temp - FDA - EC1935/2004 - USP Class VI - 80 Shore A - White - ORS183518 is 80 Shore A.The alternative names of the compound are FFPM – Dupont Kalrez and they are mostly produced by Chemraz® - Simriz® - Kalrez® - Spectrum - Triazinico - Isolast® - Parofluor® - Fluorez - Perlast® - HPSealing® - Perfluor® - Polymax. The O-ring is commonly used in and has an operating temperature range from -15 ºC to 300 ºC. O-rings 668087 are indicated as 183518 and have a DIN 3771 Size of 7.5x3.5. This item is equal to PPE Perlast G80H and has an Conform FDA - (300°C) Approval. The chemical name of this Oring is Perfluoroelastomer.