[Moisture Proof] - The vacuum storage bag can keep your filament from getting wet and prolong the life of your 3D printer filament. [Maintain Print Quality] - A damp roll of printing supplies can cause clogs, air bubbles, surface roughness, layer shifting, and more. This vacuum seal bag will keep your supplies dry and in perfect print quality. [Reusable Bag] - The air vent is covered with adhesive tape, which can be reused. [Easy to use] - Put the filament into the bag, lock the zipper with a sliding clip to seal, fix the air vent on a flat platform, release the air with a pump, press the tape to prevent air from leaking. [Note] - Tearing the adhesive tape on the vent will damage the bag. Please place the air pump directly on the tape to exhaust air. Package Contains: 20 Pieces Storage Bags Note:1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding.2. The color may vary due to different monitors, please understand. Note:Hello, please pay attention to your delivery address when purchasing products. If your receiving information (such as: name, street, house number, doorbell/email without name, etc. is incorrect, the order will not be delivered correctly.)