Selkirk 8 in. D X 12 in. L Stainless Steel Chimney Pipe

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. Tested to 2100 degrees Fahrenheit The solid pack density comprises about 85 percent air This optimum density of insulation stops expansion noises and resists and contains surges of heat