DuraTech Collection 6" Class A Chimney Pipe Wall Thimble Notice: M&G DuraVent applies to this professional grade product only when installed by a trained professional installer. The DuraTech 6" Class A Chimney Pipe Wall Thimble adjusts from a minimum of 4 to a maximum of 10 wall thickness, and fits between standard wall studs. To accommodate thicker walls, the telescoping pieces can be extended up to 16 with a field-fabricated extension installed. Interior trim ring painted black. Must be installed with DuraTech chimney pipe horizontally through the wall and extend 6 into the room beyond the interior wall. (Black painted DuraTech is available). 6 and 8 stainless steel exterior trim available. Features: 8-1/8" Inner Diameter Adjusts to 4" to 10" Wall Thickness Interior Trim Dimensions: 14" x 14" Exterior Trim Dimensions: 14" x 14" With 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. 5 -8 DuraTech is a double-wall, all-fuel chimney system for use withwood stoves, fireplaces, furnaces, boilers, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas, and zero-clearance fireplaces thatare factory-built. Looking for Simpson Dura-Vent? You found it! Simpson Dura-Vent has changed their name to DuraVent. DuraVent is a recognized technological leader in the venting industry. Consistently the first to market with new innovations in venting systems, DuraVent has captured a leadership position in emerging markets. DuraVent has patents for several products and continues to design safe and technologically advanced venting