Bellows were the preferred way to supply forced air to the blacksmith's forge until the advent of mechanical blowers during the industrial revolution. Still today many smiths utilize the bellows due to the ability to control the air blast more efficiently and the ability of the bellows to supply a strong blast of air when needed

Bellows consist of top, middle, and bottom boards with valves in the middle and bottom boards to allow air to pass from the lower chamber into the upper chamber

For the snout of the bellows a series of boards are added then shaped to funnel the air flow out the snout tube
The outside of the snout is shaped, then wrapped in leather along with the sides of the air chambers to make the bellows airtight and work as an air pump