Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image. Material Description: FKM provides superior performance in most applications, including Air, Engine Oil, Diesel Fuel, Hydraulic Oil, Automatic Transmission Fluid and Biodiesel. Most FKM formulations should not be used with Coolant/Urea. FKM is effective in high temperatures, and has good abrasion and cut resistance. Inside Diameter (in): 5.89 Coating: None Material: FKM (70) Cross Section Diameter (in): 0.22