Make repairs simple with US Stove parts like this US Stove Chimney Flue Collar for Model 1821. This flu collar is specially designed for your compatible stove. US Stove Company has been bringing warmth to homes across the nation for 140 years and has a wide range of automatic circulators, plate steel heaters, cast iron heaters, pellet/multi-fuel heaters and gas fireplaces from which to choose. The large selection of stoves and accessories will ensure warmth of your home with safe, quality products.