4", Frost Free Sillcock, 1/2" Male Iron Pipe & 1/2" Solder Connections, 3/4" Hose Thread Outlet, Sillcock Drains Automatically Upon Shut Off, Chrome Plated For Appearance & Corrosion Protection, Notched Flange Allows For Stable Installation, Lead Free Silver Solder Construction, Build In Lockshield, Pipe Threads Comply With ANSI B1.20.1.