1/2" Female Iron Pipe Or3/4" Mal Iron Pipe x 12", Red Brass, Frost Free Hydrant, Lead Free, With Arrow Breaker, Integrated Vacuum Breaker, Twice The Flow Of Regular Vacuum Breakers, Less Noise, Heavy Duty Type Metal Handle With Stainless Steel Screws, New O-Ring Seal & No-Leak 1 Piece Bonnet.