Royall 6150 Boiler Complete Fiberglass Gasket Replacement Set Contains (1) 4.5' Long, 5/8" Gasket Rope, (1) 3.5' Long, 5/8" Gasket Rope, and High Temperature Adhesive for easy installation. For Royall Boiler Model: 6150 Only • Non-Asbestos • Non-Combustible