12" length section 14" inner diameter. Tested and listed to UL 103HT standard. Use with DuraVent DuraTech chimney pipes: A venting pipe with an inner diameter of 14" is required for this unit. Dura-Vent DuraTech has you covered when it comes to your chimney. These components may be the greatest chimney liner deals on the market today, with a wide range of components designed to maximize efficiency and save you money. This 14" inner diameter x 12" length section of DuraVent DuraTech factory-built chimney liner is tested and listed to UL 103HT Standard for wood oil coal and gas. This part does not feature twist-lock connections. Instead, secure the connection with the sheet metal screws provided.

12" length section 14" inner diameter Tested and listed to UL 103HT standard Designed for use with DuraVent DuraTech chimney pipes