The DuraVent PelletVent Pro Pipe 3" Diameter Appliance Adapter is a high-quality, stainless steel adapter designed for connecting appliances to chimney systems. With a double wall construction, this adapter is suitable for use with stoves, pellet vent pipes, chimneys, and fireplaces. The 3-inch diameter makes it compatible with various systems, and it is proudly made in the United States by the trusted brand DuraVent. This adapter ensures a reliable and efficient connection for your heating and ventilation needs.