Milton S-222 M Style Coupler and Plug Reducer Kit - 5 Piece Includes one 1/2" male national pipe thread x 1/4" female national pipe thread reducer Includes one of each 1/4" female and male national pipe thread couplers Includes one of each 1/4" female and male national pipe thread plugs Maximum inlet pressure of 300 pounds per square inch Buna-N seal; Made in USA Milton is your number 1 source for Quality Air Accessories Since 1943 Milton has been producing Quality Air Accessories Milton covers automotive, industrial, hardware, agriculture, heavy-duty fleet and MRO markets