Cross Section Diameter (in): 0.354 Inside Diameter (in): 4.173 Outside Diameter (in): 4.882 Hardness (Shore A): 75 Material: NBR (Nitrile butadiene) Material Description: Nitrile (NBR) rubber is capable of service temperatures of -40 to 100C and is resistant to fuel oils, gasoline, ultra low sulfur diesel fuel and lubricants. Nitrile rubber is not recommended for applications that require resistance to bio-diesel or coolant. Color Notes: Actual o-ring color may differ from image. Notes: Dimensions and material descriptions provided for reference only.