AES Industries 1/4" NPT Male Brass In Line Air Shut-Off Ball Valve DOUBLE Male end 1/4" NPT in-line air shut off / air limiting valve. CORROSION resistant brass body with an internal stainless steel "control" ball will not have issues with typical moisture that occurs in compressed air lines. PRE-APPLIED thread sealant on both ends which will prevent any air leaks after the shut off / limiting valve is installed. CONTROL segments of your air line by installing this shut off / limiting valve at points at where the air line is being split and distributed without affecting other lines that are connected to the same source.