This FKM - FPM - Viton - GF / AED O-Ring has a diameter of 25x1.8 mm and is Black in color. The hardness of this O-ring 25x1.8 - FKM - FPM - Viton - GF / AED - 90 Shore A - Black - ORS169637 is 90 Shore A. Alternative names for the compound are Viton® - FKM, and it is commonly produced by Viton® - Du Pont - 3M - Solvay - Daikin. The O-Ring is typically used in and has an operating temperature range from -20 ºC to 230 ºC. O-Rings 989376 are referred to as 169637 and have a DIN 3771 size of 25x1.8. This item is equivalent to and has an GF / AED approval. The chemical name of this O-Ring is Fluorocarbon Rubber.