Primary Sealing Material: Rubber Seal/O-Ring Type: Standard Dash Size (in): 439 Cross Section Diameter (in): 0.275 Inside Diameter (in): 6.475 Outside Diameter (in): 7.025 Hardness (Shore A): 75 SAE AS568 Dash Size: -439 Color: Black Material: FKM Material Description: FKM rubber is capable of service temperatures of -40 to 150C and is resistant to air, fuel (including bio-diesel), lubricants and oils. FKM rubber should not be used in applications that require resistance to water or coolant. Coating: None Color Notes: Actual o-ring color may differ from image. Notes: Dimensions and material descriptions provided for reference only.