Test Plug Air Connection Gender Female Air Connection Size 33/64 in Air Connection Type NPT Body Surface Style Smooth Deflated Diameter 8.25 in Deflated Length 24 in For Maximum Pipe Inside Diameter 16 in For Maximum Pipe Size 16 in For Minimum Pipe Inside Diameter 0.38 in For Minimum Pipe Size 14 in Head Tether Connection Handle and Strap Inflated Length 28.13 in Maximum Back Pressure (Air) 20 psi Maximum Back Pressure (Water) 30 ft of head Number of Inflation Chambers 1