Test Plug Air Connection Gender Female Air Connection Size 35/64 in Air Connection Type NPT Body Surface Style Smooth Deflated Diameter 1.75 in Deflated Length 19.25 in For Maximum Pipe Inside Diameter 3 in For Maximum Pipe Size 3 in For Minimum Pipe Inside Diameter 0.38 in For Minimum Pipe Size 2 in Head Tether Connection Handle and Strap Inflated Length 18.5 in Maximum Back Pressure (Air) 58 psi Maximum Back Pressure (Water) 30 ft of head Number of Inflation Chambers 1