A scuba tank is a high-pressure cylinder used to store compressed air for underwater breathing. Typically made of aluminum or steel, these tanks are designed to withstand the pressure of the air inside, allowing divers to explore underwater environments safely. The air in the tank is usually a mixture of nitrogen and oxygen, similar to what we breathe on the surface. Scuba tanks come in various sizes, commonly ranging from 10 to 120 cubic feet. They are equipped with a valve that controls the flow of air and connects to a regulator, which reduces the pressure for safe inhalation. Proper maintenance and regular inspections are essential for ensuring the safety and functionality of scuba tanks.