DuraVent DuraTech 5" and 7" Adjustable Roof Support orange and use 4 x 6-5/8

and use 4 x 6-5/8 venting

Easy to handle and easy to use

The Whisper Lift® II is

Sure to be the focal point of any room

DuraVent DuraTech 5" and 7" Adjustable Roof Support orange and use 4 x 6-5/8With a Thermal Tech blanket insulation encased between dual walls, DuraTech offers the optimum in safety and performance. It keeps the outer wall of the chimney cool, while ensuring high flue gas temperatures for optimum draft performance. The inner wall is 25% thicker than competitive chimneys for an extra margin of safety. No locking bands or mechanical fasteners required. DuraTechs sleek 1" wall design provides for easy installations through 16" on