DuraVent DuraTech All-Fuel Adjustable Galvanized Chimney Pipe Wall Strap - For 7" Inner Diameter DuraTech: The venting pipe for this unit must have a 7" inner diameter. A chimney must be securely secured, or it may fail and cause a major mess. With the DuraTech All-Fuel Adjustable Galvanized Chimney Pipe Wall Strap, you have a device that has been designed to take Chimney Pipes with a 7" inner diameter and make sure that they stay put so that every time you decide to get a fire going in your fireplace you can do so without any concern about the stability of your chimney.

Supports and stabilizes chimney pipes Adjusts 2" to 6" Galvanized steel construction For use with 7" DuraTech chimney pipes Limited lifetime warranty