Pipe Plug, Pneumatic, Nominal Size 2 In, Max Back Air Pressure 13 PSI, Max Back Pressure 30 Ft of Head, Required Inflation Pressure 35 PSI, Deflated Size 5.81L x 2.38D In, Material of Construction Rubber And ABS Plastic, For Use In Stack Testing Of DWV Systems RestrictionsNote: Always block plugs when conducting air test11s. Consult manufacturers' safety instructions before installing product.