Store and protect 3D printer filaments, optical equipment, and other sensitive material in a humidity-controlled environment. Also known as dry boxes and desiccator cabinets, these cabinets prevent moisture-sensitive 3D printer filaments, such as nylon, ABS, and polycarbonate, from becoming brittle, discolored, or broken. They also keep sensitive electrical and optical equipment, such as microscopes and lenses, free from mold and fungus. Their moisture-absorbing desiccants recharge automatically, so you don't have to remember to charge them yourself or worry about the humidity rising unintentionally.