DuraVent DuraTech 7" Inner Diameter All-Fuel Stainless Steel Chimney Elbow Kit - 15-Degree: A vent pipe with a 7" inner diameter is required for this unit. When you're trying to get around something that's in the way of appropriate ventilation installation, you'll need DuraTech's All-fuel stainless steel chimney elbow kit. You can be confident that the heat emitted by wood, coal, and gas appliances will not damage your chimney thanks to its sturdy stainless steel composition and insulation. Two stainless steel elbows and one elbow strap are included with this set. You won't have to keep track of screws or other fasteners. It's held firmly in place by a simple twist and lock mechanism.

15 Degree Elbow Double-wall chimney elbows for venting wood oil coal and gas appliances Offsets venting obstructions Swivels 360¡ at base .016" stainless steel outer wall and .020" stainless steel inner wall Insulated by a layer of ceramic refractory blanket Secure twist-lock connections 2" clearance to combustibles 7" inner diameter with a 9" outer diameter Kit includes: two (2) stainless steel elbows and one (1) elbow strap Limited lifetime warranty UL Listed