Tru-Flate Air Coupler/Plug Kit *Product Type: Air Coupler/Plug Kit *Material: Brass/Steel *Thread Size: 1/4 in. *NozzleType: Female/Male *Number in Package: 4 pc. *Kit includes one each: 1/4" Female NPT Coupler (13-235), 1/4" Male NPT Coupling (21-505), 1/4" Male NPT Plug (12-225) and 1/4" Female NPT Plug (12-235) *Discovery CON, NBR, SUP