This EPDM O-Ring is 73.50x5mm and in the color Black. The Hardness of this O-ring 73.50x5 - EPDM - Peroxide - FDA - EC1935/2004 - USP Class VI - 3A Sanitary - Shore A - Black - ORS221708 is 70 Shore A.The alternative names of the compound are and they are mostly produced by Dow Chemical - ExxonMobil - and Lion Elastomers. The O-ring is commonly used in and has an operating temperature range from 150 ºC to -55 ºC. O-rings 6589850 are indicated as 221708 and have a DIN 3771 Size of 73.50x5. This item is equal to and has an FDA - EC1935/2004 - USP Class VI - 3A Sanitary Approval. The chemical name of this Oring is Ethylene Porpylene Diene Monomer.