Plumbshop stainless steel gas connectors are made of corrugated stainless steel, available in a wide range of configurations and lengths. Clear coated stainless steel provides a neat installation and protection from corrosion caused by most household chemicals.  Ideal for large-demand appliances  such as 5-burner+ gas ranges, furnaces and smaller BTU residential tankless water heaters.  Use with natural, manufactured, mixed and LP gases and LP gas-air mixtures.  Connectors are 100% leak tested, approved for indoor and outdoor use and have a temperature rating of -40 degrees to 150 degrees. Pressure rating: 1/2 psi maximum;  CSA  certified to ANSI Z21.24/CSA 6.10 and ANSI Z21.75/CSA 6.27.