Test Plug Air Connection Gender Female Air Connection Size 23/64 in Air Connection Type NPT Body Surface Style Smooth Deflated Diameter 2.67 in Deflated Length 9 in For Maximum Pipe Inside Diameter 4 in For Maximum Pipe Size 4 in For Minimum Pipe Inside Diameter 0.38 in For Minimum Pipe Size 3 in Head Tether Connection Handle and Strap Inflated Length 12 in Maximum Back Pressure (Air) 57 psi Maximum Back Pressure (Water) 30 ft of head Number of Inflation Chambers 1