Mechanical Expansion Plug, Bypass Connection Size Not Applicable, Bypass Connection Type Not Applicable, Bypass Thread Gender Not Applicable, For Maximum Pipe Inside Diameter 0.45 in, For Minimum Pipe Inside Diameter 0.41 in, For Pipe Size 7/16 in, Handle Material Brass, Included Water Fill Port/Hose Not Applicable, Maximum Back Pressure (Air) 10 psi, Maximum Back Pressure (Water) 23 ft of head, Overall Height 1.42 in, Padlock Shackle Diameter Not Applicable, Plate Material Zinc-Plated Steel