Ball Plug Air Connection Gender Female Air Connection Size 3 in Air Connection Type Tire Valve Body Surface Style Textured Bypass Connection Size 1/2 in Bypass Connection Type NPT Bypass Thread Gender Female Deflated Diameter 2.5 in Deflated Length 8 in For Maximum Pipe Inside Diameter 3.25 in For Maximum Pipe Size 3 in For Minimum Pipe Inside Diameter 2.62 in Head Tether Connection Ring and Chain Inflated Length Not Applicable Maximum Back Pressure (Air) 22 psi