This EPDM O-Ring has a diameter of  mm and is Black in color. The hardness of this O-ring - 23.7x1.78 - EPDM - 70 Shore A - Black - Peroxide - FDA - EC1935/2004 - NSF61 - ORS198731 is 70 Shore A. Alternative names for the compound are Ethylene propylene diene monomer, and it is commonly produced by Dow Chemical - ExxonMobil - and Lion Elastomer. The O-Ring is typically used in and has an operating temperature range from -55 ºC to 150 ºC. O-Rings 1300331 are referred to as 198731 and have a DIN 3771 size of . This item is equivalent to and has an FDA - EC1935/2004 approval. The chemical name of this O-Ring is Ethylene propylene diene monomer.