Selkirk Adjustable 3 in. D Aluminum/Galvanized Steel Draft Hood Connector

A transition fitting for connecting double wall Metalbestos pipe to the single wall flue collar or draft hood outlet of the appliance. Flexible shank can be shaped to fit oval outlets. 4-1/2 inch length. Size refers to the inside diameter of the pipe or fitting. The outside diameter of RV is approximately 1/2 inch larger. Type B gas vent.