Corrugated flexible Stainless Steel gas dryer connector Polymer coated 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 Uniform coating leaves no gaps and protects against corrosion and leaks 1/20in inside diameter, 5/8-in outside diameter, tube with fittings 3/4-in FIP x 3/4-in MIP 24-in length