This FFKM - FFPM O-Ring is 5.5x1.75mm and in the color White. The Hardness of this O-ring 5.5x1.75 - FFKM - FFPM - FDA - EC1935/2004 - USP Class VI - 70 Shore A - White - Kalrez® 6880 - ORS230371 (Equivilent) is 70 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 -20 ºC to 270 ºC. O-rings 804772 are indicated as 230371 and have a DIN 3771 Size of 5.5x1.75. This item is equal to Kalrez® 6880 - Kalrez® 6221 - Perlast® G74S and has an FDA - EC1935/2004 - USP Class VI - 3A Sanitary Standard Approval. The chemical name of this Oring is Perfluoroelastomer.