20pcs U-Shaped Double Zipper Vacuum Storage Bags with Auto Pump, Lightproof & Airtight For 3D Filaments, Sealer Bags, Compression Storage, Filament Dryer Bag

Complete Moisture & Dust Protection for Flawless Prints: Humidity causes brittle filament, clogging, stringing, and layer shifting. Seal immediately after drying to keep filament dry for smooth, strong prints Large Size Fits Most Filament Spools: 32×34cm (12.6×13.38in) bags fit most 1kg 1.75mm filament rolls—one bag per spool for tidy storage USB Electric Pump for Quick Vacuum Sealing: Upgraded auto pump with one-click start removes air fast. Press firmly on valve for an efficient, effortless seal—faster than manual pumps Patented Seal + Thickened PA+PE Material: U-shaped double zipper with sealing clips ensures a tight, leak-proof seal; black lightproof design blocks UV; rounded corners resist puncture for lasting durability All-in-One 20-Piece Set: Includes 20 storage bags, 1 electric pump, and 3 sealing clips. The electric pump quickly removes air while clips reinforce the bag seal—ideal for everyday filament storage