Insulated Wall Thimble, 8" Diameter, DuraTech - 8DT-IWT

8DT-IWT is a insulated wall thimble. Adjusts from a minimum of 5½“ to a maximum of 9½” wall thickness, fits between standard wall studs and the interior trim is painted black. To accommodate thicker walls, the telescoping pieces can be extended up to 16” when a field-fabricated extension is installed. The Wall Thimble must be installed with DuraTech chimney pipe horizontally through the walls and extend 6” into the room beyond the interior walls. Exterior trims for the wall thimble are available. This is a genuine manufacturer venting component.