Selkirk 6.37 in. D X 7 in. L Aluminum/Galvanized Steel Stove Pipe Elbow, Pack of 6

6RV-90 ADJ 90 Degree Elbow 6in. ID. Used when an offset is required to avoid obstructions such as rafters, joists and other construction obstacles. Used to orient pipe between vertical and horizontal orientation. Four piece adjustable elbow twists for easy offsets.