This FFKM - FFPM O-Ring is 60 x 5.3mm and in the color Black. The Hardness of this O-ring 60x5.3 - FFKM - FFPM - Low Temp - Kalrez 0040 - 75 Shore A - Black - ORS220430 (Equivalent) is 75 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 -40 ºC to 250 ºC. O-rings 622377 are indicated as 220430 and have a DIN 3771 Size of 60 x 5.3. This item is equal to Dupont Kalrez 0040, Greene Tweed Chemraz 505 and has an LT40 Approval. The chemical name of this Oring is Perfluoroelastomer.