Brasscraft CSSD54-18P 18" Gas Heater Connector, Stainless SteelBrasscraft CSSD54-18P 18" Gas Heater Connector, Stainless Steel, Features; Corrugated flexible Stainless Steel gas heater connector; Polymer coated; Uniform baked-on polymer coating leaves no gaps to resist corrosion and chemicals and protect against leaks; Manufactured without soldered or brazed joints from type 304 Stainless Steel; Broader face nuts and fittings with smoother connector ends seal with less torque for easy installation; CSA IAS design certified for gas appliances indoor and outdoor; 3/8" inside diameter and 1/2" outside diameter with fittings; 1/2" FIP x 1/2" MIP; 18"