LDR 509 1130SS Flexible Gas Connector 1/2-Inch OD Stainless Steel Tube, 1/2-Inch FIP x 1/2-Inch MIP x 30-Inch. Flexible gas connector. 1/2-Inch OD (outer diameter) stainless steel tube. Used for water heaters, dryers and space heaters. CSA certified. Limited lifetime warranty.