What device is used for lowering heavy loads and is made of aluminum?

The correct answer is the hoisting device. This equipment is specifically designed to lower heavy loads and is commonly constructed from aluminum due to its lightweight yet strong characteristics. Aluminum allows for easier handling and transport of the hoisting device while ensuring it can support the required weight safely.

Hoisting devices are often used by fire departments in rescue operations and other scenarios where lifting or lowering heavy objects is necessary. They provide essential mechanical advantage, allowing personnel to move heavy loads vertically with greater efficiency and safety.

While the other options may relate to equipment used in various tasks within firefighting or rescue operations, they do not specifically pertain to the act of lowering heavy loads or their construction from aluminum. For instance, a brake tube is typically associated with hydraulic systems, a rope gripper is designed to secure ropes rather than lift or lower loads, and a load controller is focused on managing the weight distribution rather than serving as a hoisting mechanism.