Material: HNBR - Hydrogenated Nitrile Cross Section Height (in): 0.11 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. Cross Section Width (in): 0.13 Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image. Inside Diameter (in): 2.56