Chimney has been filling the supply and accessory needs of over 8 000 chimney sweeps hearth retailers masons and contractors for over 25 years. Chimney has the privilege of serving over 80% of the chimney professionals in America.Founded by Robert Daniels Sooty Bob in 1978 Chimney has grown from a one-man operation to a national network of six warehouses and a manufacturing plant. From its headquarters in Fairfield Iowa Chimney plays a major role in providing for the Chimney industry. Installing a direct vent through a combustible wall is simple with a Selkirk Direct-Temp Direct Vent Black Wall Thimble. This convenient venting accessory combines the functions of two separate components allowing you to place pipe through a wall and provide a firestop with only one product. In other words this wall thimble will save you both time and money. Selkirk s Direct-Temp line of venting products stands out amongst its competitors because of its unique blend of versatility and strength. For example how many other brands of piping are capable of venting corn pellet and gas heating appliances? And how many boast a construction resilient enough to resist corrosion and leaks yet still appear elegant? This series also includes a variety of specialized items like this Direct Vent Black Wall Thimble to help you find a solution for every type of venting challenge. There s no better choice than Direct-Temp for convenient and reliable venting. Efficiently vents gas corn and pellet direct vent appliances Single pipe provides vents exhaust and brings in combustion air Heavy-duty galvanized steel outer wall 304 alloy stainless steel inner wall resists corrosion Leak-proof silicone and fiberglass connections Rivet and weld-free outer profile with sleek black finish 1 clearance to combustibles Gasket joints require no sealant 4 inner diameter with 6 5/8 outer diameter Lifetime Available in five lengths- SKU: CPPF2272