This elbow kit contains two 15° elbows, two locking bands and one interior resupport. When creating an offset in the chimney pipe system, calculate the offset to determine the elbow angle. Locking bands are to be used at each joint. The interior resupport is designed to provide support above an offset where the upper elbow connects to the next pipe length. The elbows rotate 360° to provide the exact orientation required. 15° Insulated Elbows can be used for fixed offsets of 15° slope or in pairs for offsets adjustable from 0° to 30° slope. Galva-Temp is designed for all-fuel applications and comes with a galvanized steel outer casing. Galva-Temp chimney pipe is insulated with 1 solid pack and UL Listed to UL-103 standards. with stainless steel inner pipe, 1-inch premium insulation, durable galvanized steel outer pipe, this is the coolest under the hottest conditions.Includes 2 Elbows, 2 Locking Bands, Interior Resupport Maximum Continuous: 1,000 Degrees Fahrenheit 540 Degrees Celsius Brief Forced Firing: 1,400 Degrees Fahrenheit 760 Degrees Celsius (60 min.) Creosote Burn Out: 2,100 Degrees Fahrenheit 1,150 Degrees Celsius (3 x 10 min.)Elbow by Angle: 30 (degree) Finish: Ultra Fuel Type: Coal, Oil, Wood Height: 6-1 4 Material: Aluminized Steel, Stainless Steel Number of Pieces: 5 Outside Diameter: 8 Pipe Class: Class A Pipe Inside Diameter: 6 Pipe Shape: Round UL Listed: Yes Vent Construction: Double Wall