Protech Mini Automatic Vacuum Pump with BagsIf you own a 3D printer, it is important to keep any unused filament dry to ensure a better build quality of your prints. Many filament types are hygroscopic which means they can draw in moisture from the air. Any moisture can lead to stringing, air bubbles, poor bed adhesion, etc. This mini vacuum pump provides an easy and affordable way to keep your printer filament dry. Simply insert your filament into one of the 6 bags provided, seal the bag, and