Dash Size (in): 148 Seal/O-Ring Type: Standard Primary Sealing Material: Rubber Cross Section Diameter (in): 0.103 Inside Diameter (in): 2.737 Outside Diameter (in): 2.943 Material: Nitrile (NBR) 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. Hardness (Shore A): 75 SAE AS568 Dash Size: -148 Coating: None Color: Black Color Notes: Actual o-ring color may differ from image. Notes: Dimensions and material descriptions provided for reference only.