Reduces the center hole diameter in the Ceiling Support/Wall Thimble Cover to fit 3- or 4-inch pipe. Can be used as trim collar when penetrating a masonry chimney with PelletVent Pro. Painted black.
PelletVent Pro is a venting system designed for stoves and inserts that use wood pellets and oil fuel. It is also built to vent biofuel products (corn, switch grass, cherry pits, soybeans, coffee husks, sunflower hulls, walnut shells and wheat). The systems perfect fit and finish is made possible with a laser-welded inner and outer wall for superior performance.