SD Series, 36", Pro-Coat Epoxy Coated, Stainless Steel Gas Appliance Connector, 3/8" I.D. x 1/2" O.D. Tube, 1/2" Female Pipe Thread x 1/2" Male Pipe Thread, Product Comes in Re-Sealable Zip lock Bags, AGA Approved & IAS Design Certified For Indoor/Outdoor Use, Recommended For Forced Air Heaters, Gas Ranges, Furnaces, & Water Heaters. 36-Inch Stainless Steel Gas Heater Connector CSSD54-36P