Rutland Grapho-Glas Gasket Spools contain graphite impregnated, braided fiberglass gasketing engineered to provide superior sealing, protection, and longevity. Also resists abrasion, creosote and soot adhesion, and temperatures up to 1000°F. Used by major stove manufacturers and to replace worn-out gaskets in wood and coal stoves or fireplace inserts. Annual replacement of stove gaskets ensures a tight seal for maximum airtight operation and efficiency.