This HNBR O-Ring has a diameter of 300x8 mm and is Black in color. The hardness of this O-ring 300x8 - HNBR - AED - 70 Shore A - Black - ORS97883 is 70 Shore A. Alternative names for the compound are Hydrogenated Nitrile Butadiene Rubber, and it is commonly produced by LG Chem - Lanxess and Zeon. The O-Ring is typically used in and has an operating temperature range from -25 ºC to 150 ºC. O-Rings 720957 are referred to as 97883 and have a DIN 3771 size of 300x8. This item is equivalent to and has an AED approval. The chemical name of this O-Ring is Hydrogenated nitrile rubber.