Sure-Temp, 6" x 24", 6T-24, All Fuel, Double Wall, Chimney Pipe Comes equipped with locking band and solid pack insulation Tested to withstand 2100 F and is UL listed Test helps to prevent product damage, or structural hazard during brief periods of this excessive chimney temperature Constructed with a stainless steel outer casing and inner liner Sure-Temp, 6" x 24", 6T-24, All Fuel, Double Wall, Chimney Pipe Comes equipped with locking band and solid pack insulation