Creality Filament Vacuum bags are used to keep your filament from absorbing moisture from the air. With this kit your filament will stay tip top for longer.What’s in the box?1 x Pump used to pump out the air and create a vacuum to keep the filament dry.20 x Desiccant bags5 x Humidity strip indicators to be able to tell if your filament is wet.5 x Bag sealing clips10 x Storage bags