Brennan N2405-08-08-SS Stainless Steel Compression Tube Fitting, Straight Adapter, 1/2" Tube OD x NPT Female Adapter for connecting pipes or fittings of different types Push-to-connect fitting connects to pipes or tubing on one end and has an NPT female connector on the other Made of stainless steel for resistance to scaling and corrosion Double ferrule fitting reduces possibility of leakage Meets ISO 9001:2008 quality assurance standards