Cap Application Fuel Oil Gases Compatible Pipe Size 4 in Fitting Connection Type Press Fit Fitting Material Carbon Steel O-Ring Material HNBR Specific Fitting Shape Cap Overall Length 4 21/32 in Includes Center Stop No Center Stop Finish/Coating Zinc Nickel-Plated Compatible Copper Tube Type Not Applicable Compatible Pipe Material Carbon Steel Compatible Tool Brand MegaPress XL Rings and PressBooster Z3 Actuator Includes Pre-Applied Thread Sealant Yes