This EPDM O-Ring has a diameter of 55.3x5.7 mm and is Black in color. The hardness of this O-ring 55.3x5.7 - EPDM - 70 Shore A - Black - Sulphur - ORS209434 is 70 Shore A. Alternative names for the compound are , and it is commonly produced by Dow Chemical - ExxonMobil - and Lion Elastomers. The O-Ring is typically used in and has an operating temperature range from -45 ºC to 130 ºC. O-Rings 45257 are referred to as 209434 and have a DIN 3771 size of 55.3x5.7. This item is equivalent to and has an None approval. The chemical name of this O-Ring is Ethylene propylene diene monomer.