3/4" Male Iron Pipe, Tapped 1/2" Female Iron Pipe x 3/4" Female Iron Pipe x 48", Safety Plus Advantage Coated Stainless Steel, Gas Connector, 15/16-16 Thread, 1/2" I.D., 5/8" O.D., Tube With Fittings, AGA Approved & IAS Design Certified For Indoor/Outdoor Use.