Mr. Gasket Ultra Seal Valve Cover Gasket Set Features: Creates A Positive Seal Controlled Swelling Gasket Thickness Will Not Decrease Eliminates Re-Torque Of Valves High-Tensile Strength Handles Ex Flange Pressure Forms Leak proof Seal Black Latex Coating Height: 28.50 Width: 5.60 Length: 0.40 Weight: 0.31 lbs