Made in the USA, this Big Top Multi-Flue Chimney Cap by HY-C Company is a smart choice for multi-flue chimneys in most regions. Made with a 24 gauge removable galvanized steel hood with scalloped corers and roll-formed edges it also features 24 gauge galvanized steel base flanges for secure mounting. The 18 gauge 3/4 galvanized steel expanded metal mesh is available in 8 , 10 and 14 heights. The attractive black powder coat finish helps it to stand up to the elements. Available in many stock and custom sizes and can also be ordered in 18 gauge 5/8 galvanized steel expanded metal mesh to meet California requirements.Chimney caps act as a spark arrestor to prevent most ascending sparks from reaching the outside. Recommended for use in situations where Oil or Coal is burned, or when Wood/Pellets are used as primary source of heatFlange to Flange 16.5 X 36.5