The PelletVent Pro 45 Degree Elbow is for use to offset pipe diagonally or horizontally around obstructions. Elbow swivels a full 360 degrees at the base, angle is not adjustable. PelletVent Pro is a venting system designed for stoves and inserts that use wood pellets and oil fuel. It is also built to vent corn and other biofuel products (Rated for continuous use flue temperatures up to 570 Degree F).