DuraPlus 6″ SS Tee Support Bracket The DuraBlack 7″ Single Wall Stovepipe 90 Degree Elbow is a component that is used in a typical venting installation. The 90 degree elbow offsets obstructions as needed. The angle is not adjustable and is not recommended for rear exit appliances. Features: Type: Bracket. Supports Tee. Finish: Stainless Steel. Supports Up To 35′ of DuraPlus Chimney Pipe. UL Listed. Specifications: Overall Dimensions: 14″ (W) x 12″ (H). Inner Diameter: 6″. Outer Diameter: 10″.