The DuraPlus 6 in. Diameter Wall Thimble adjusts from a minimum of 4-1/4 in. to a maximum of 7-1/4 in. wall thickness, and fits between standard wall studs. To accommodate thicker walls, the telescoping thimble can be extended up to 16 in. with a field-fabricated extension installed. This wall thimble must be installed with DuraPlus chimney pipe horizontally through the wall and extend a minimum of 2 in. into the room beyond the interior wall.

• Designed to stay cool on the outside, to provide a hot draft on the inside, to boost stove efficiency, and to provide for a fire-safe design that protects both the chimney and the building
• Triple-wall chimney features two insulating layers (refractory blanket, plus air space)
• Refractory insulation is held securely in position, eliminating hot spots common with loose-fill type insulations
• Adjusts from a minimum of 4-1/4 in. to a maximum of 7-1/4 in. wall thickness, and fits between standard wall studs
• Telescoping thimble can be extended up to 16 in. with a field-fabricated extension installed
• Interior trim ring painted black
• Wall thimble must be installed with DuraPlus chimney pipe horizontally through the wall and extend a minimum of 2 in into the room beyond the interior wall