Our cathedral ceiling kit includes all the components necessary to connect single wall stove pipe to double wall Class-A chimney and vent it through a cathedral ceiling. Individual parts description Stove Pipe Adapter is the transition piece that connects the single wall stove pipe to the ceiling support box. Ceiling Support Box mounts to the ceiling joists or roof (depending on your installation) and allows the chimney to safely pass through the ceiling and into the attic. Can support a maximum of 50 ft. of chimney. Includes trim to provide a finished look inside the home. Roof Flashing provides leak prevention for the roof penetration of the chimney system. Storm Collar works together with the roof flashing to provide a waterproof seal where the chimney passes through the roof. Chimney Cap tops off the chimney system to keep out rain, snow, leaves, debris, and animals. Installation notes single Wall Stove Pipe is not included in this kit and is required to connect your wood stove or other heating appliance to the support box. To complete this kit, purchase the lengths of pipe needed to run from the support box out the roof. If the chimney extends more than 5 ft. above the roof an Extended Roof Brace (sold separately) must be installed. Certification Certified and listed to the UL 103HT standard and designed for appliances that are listed for use with a 2100° Fahrenheit. Material: Stainless Steel.