Nylon Expansion Plug Kit, Compatible Pipe Diameter (Maximum) 4 in, Compatible Pipe Diameter (Minimum) 3/4 in, Barb Size 3/8 in, Number of Plugs 18, Includes ABS Case, Foam Insert, Material Natural Rubber, Nylon, Plug Color Yellow, Plug Diameter 3/4 in, 1 in, 1 1/4 in, 1 1/2 in, 2 in, 2 1/2 in, 3 in, 3 1/2 in, 4 in, Process Pipework Leak Testing, Resistance Properties