8 in. x 9 in. Stainless Steel Sure Temp Insulated Pipe

Type HT chimney pipe special augured in mineral wool insulation filling the space between stainless steel walls is only 1 inch thick, yet provides 17 times the insulating valve of brick. The “solid pack” density comprises about 85 percent air. The mixture of extremely fine fibers trap this air in the pores of the insulation and also blocks radiation heat transfer.