6in. DuraTech Insulated Wall Thimble

The 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. .