This kit includes -
The gasket material creates a seal between the steel of the barrel and the steel of the top plate. Some additional strips are provided for the divider plate. This plate separates the air in the combustion chamber from the exhaust from the burn.
The basic design uses concrete blocks for the straight walls and a curved section to accommodate the barrel. The curved section can be done by cutting many small fireclay bricks or purchasing the Barrel Supports. Do not use any form of cement or regular mortar with the barrel supports.
Additional items you will have to acquire for this build: