Our square black galvanized steel chimney caps by Bernard Dalsin MFG.CO. are produced with excellent quality, which is why this brand is getting our Top Pick. These chimney caps will help protect internal metal fireplace fixtures and masonry chimney from deterioration. They will also keep out rain, birds, animals and debris, and are mad of 100% galvanized steel. Quick and easy installation requires only a screwdriver. Made in the USA backed by a lifetime limited warranty.