Gelco 1 Hole Stainless Steel Chase Cover - 36" x 36".
A Gelco Chase Cover fits over the outside of the brick, wooden, or metal chase of the chimney so your measurements must be accurate to within 1/8" for each side. Mortar joints are not always the same width, so one side of a chimney could be longer than another, please do not estimate your measurements. The manufacturer will allow up to 3/8" for proper clearance, so please do not pad your measurements.