Imperial Universal Stack Boot For In-Line Transition From Round Pipe, Galvanized Steel, 3-1/4 x 10-in, 5-in Diameter

This easy-to-install Imperial stack boot helps flex duct or round metal pipe transition neatly into a standard 3x10 inch vent or register opening. Made from galvanized steel for durability, the universal boot measures 5 inches across and fits round pipe up to the same diameter. No matter the vent configuration in your home, this stack boot ensures a smooth, straight run from ductwork to register for efficient airflow and a snug fit.