Test Plug Air Connection Gender Male Air Connection Size 1/4 in Air Connection Type NPT Body Surface Style Textured Bypass Connection Size Not Applicable Bypass Connection Type Not Applicable Bypass Thread Gender Not Applicable Deflated Diameter 12 in Deflated Length 10 in For Maximum Pipe Inside Diameter 8.25 in For Maximum Pipe Size 8 in For Minimum Pipe Inside Diameter 3.7 in For Minimum Pipe Size 4 in Head Tether Connection Handle and Chain Inflated Length 12 in