Test Plug, Pneumatic, Nominal Size 8 To 12 In, Min Dia 7.09 In, Max Dia 12.25 In, Max Back Air Pressure 17 PSI, Max Back Pressure 40 Ft of Head, Required Inflation Pressure 30 PSI, Deflated Size 17.50 In, Material of Construction Rubber, For Use In DWV Systems To Seal Round And Out Of Round Pipe