Pipe Plug, Mechanical, Nominal Size 8 In, Min Dia 7.7 In, Max Dia 8.03 In, Max Back Air Pressure 17 PSI, Max Back Pressure 40 Ft of Head, Deflated Size 3.75L x 7.75D In, Material of Construction Rubber And ABS Plastic, For Use In End of Pipe Sewer Testing And Long Term Applications