This FKM - FPM - Viton O-Ring has a diameter of 37.7x3.53 mm and is Green in color. The hardness of this O-ring 37.7x3.53 - FKM - FPM - Viton - 90 Shore A - Green - ORS207052 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 -15 ºC to 200 ºC. O-Rings 393803 are referred to as 207052 and have a DIN 3771 size of 37.7x3.53. This item is equivalent to and has an approval. The chemical name of this O-Ring is Fluorocarbon Rubber.