Coating: None Dash Size (in): 250 Inside Diameter (in): 4.98 Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image. Cross Section Diameter (in): 0.14 Material Description: HNBR provides excellent abrasion and cut resistance. It works well with Air, Engine Oil, Diesel Fuel, Hydraulic Oil and Automatic Transmission Fluid applications. Some formulas may be used with Coolant/Urea. Do not use with Biodiesel. Material: HNBR - Hydrogenated Nitrile