Selkirk 6″ Ultra-Temp Flat Ceiling Support Kit The Ultra-Temp Chimney System is a rugged chimney designed for maximum safety and performance! Ultra-Temp includes a variety of components to meet every installation requirement. These components may be combined in a wide variety of ways to solve almost any chimney installation problem. Includes: Round top, attic insulation shield, storm collar, finish support pkg., adjustable flashing, stove pipe adaptor. Features: Material: 304-alloy stainless steel inner liner. Limited Lifetime Warranty. 6″, 7″, and 8″ List to UL 103HT. Stainless Steel Outer. 1″ Solid Pack insulation. Twist-Lock Coupler w/Locking Band included. 2″ Clearance to combustibles. UL Listed to UL 103HT. Specifications: Overall Dimensions: 6″ (W).