DuraVent DuraTech 8" Diameter Extended Roof Bracket btu62000 and tight enough to keep

and tight enough to keep sparks inside

It may be built into the wall

SHDP6-SG 20" x 20" I

Dagan 4444 Five Piece Fireplace Tool Set

DuraVent DuraTech 8" Diameter Extended Roof Bracket btu62000 and tight enough to keepWith a Refractory 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. DuraTech's sleek 1" wall design provides for easy installations through 16" on center