Selkirk Corporation 8UT-48 8 Inch x 48 Inch Ultra-Temp Ultra Temp Chimney Length 8-inch inner diameter all-fuel chimney pipe 48-inch long pipe section Sturdy design and construction ensures maximum performance and safety Pipe stays cool on the outside to protect the home during normal stove operation High interior chimney pipe heat discourages the deposit of creosote and creates the proper draft for efficient stove use Fire-safe design allows the hot metal to flex and expand as it cools the chimney Chimney pipe has been tested listed and certified to meet UL103HT safety standards up to 2100 degrees by Underwriters Laboratories for all-fuel chimney systems Pipes inner liner is made of 304 alloy stainless steel 1-inch solid pack insulation between inner liner and outer casing Outer casing is stainless steel Minimum 2-inch clearance to all combustibles is required