'Mechanical Expansion Plug, T-Handle, Nominal Size 1-1/4 In., Min. Dia. 1.21 In., Max. Diameter 1.35 In., Max. Back Pressure 12 ft. of Head, Max. Back Pressure 12 ft. of Head, Material of Construction Stainless Steel, Neorene Rubber, For Use In Low pressure seal in circular openings'