The black Rocket Rubber Dust Blower Ball from Amzer is used to clean dust and debris off lenses, LCD screens, filters, glasses, and other optical equipment that needs continual cleaning and maintenance. The rocket-shaped silicone blower has a built-in valve that only lets clean air in, so dust is not reapplied onto the surface of what you are cleaning. After squeezing the elastic body of the blower, it restores itself to its original shape, and the fins on the bottom of the blower ensure it stays upright on a flat surface and does not roll away.