Test Ball Plug Air Connection Gender Female Air Connection Size 4 in Air Connection Type Tire Valve Body Surface Style Textured Bypass Connection Size 3/4 in Bypass Connection Type NPT Bypass Thread Gender Female Deflated Diameter 3.13 in Deflated Length 8 in For Maximum Pipe Inside Diameter 4.25 in For Maximum Pipe Size 4 in For Minimum Pipe Inside Diameter 3.25 in Head Tether Connection Eyebolt Inflated Length Not Applicable Maximum Back Pressure (Air) 22 psi