SELKIRK Sure-Temp 30 Deg Insulated Elbow Kit Elbow kit includes two 30 degree elbows, 2 locking bands and 1 interior re-support. This kit allows the chimney to be offset in a way to avoid obstructions that may occur prior to exiting the roof. UL standard 103 prohibits angles greater than 30 degrees. The interior resupport provides a firm attachment of the chimney to interior joists or framework. The required locking bands allow 360 degree rotation and lock the components together in place at the exact offset required. Insulated elbows can be used at the same two-inch air space clearance as chimney sections. Angle 30 deg, Pipe Size 6 , Material Stainless Steel, For Use With Model SSII, Pkg Qty 1, Package Type Box