This kit includes 8 or 15 feet of door gasket material and a tube of high temperature silicone for gluing it in place. The kit works on any Heatmaster outdoor wood boilers and on many other brands as well. For information on how to change a door gasket, please visit this page: https://www.pineviewwoodstoves.com/single-post/2017/01/25/Fire-Box-Door-Gasket
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If you're looking for a more premium door gasket kit, which includes 15 feet of silicone coated gasket, visit this page https://www.pineviewwoodstoves.com/product-page/outdoor-boiler-door-gasket-kit