"African Fang bellows are carved wooden tools used by the Fang people of Gabon and surrounding regions to provide forced air for blacksmithing, combining essential technology with high-level artistry, often featuring symbolic human or animals forms to imbue them with spiritual power for the forge.
These functional artifacts serve as important examples of African utilitarian art, demonstrating the cultural significance placed on ironworking, a process sometimes seen as sacred." cited on the internet having googled "Fang bellows"