eVacuum Sealed Bags Filament Storage Kit, for 1 Spool & 2 Spools

Microporous Vacuum Bag A micro-porous vacuum bag enables maximum air removal. Keeps your filaments against moisture and dirt. Double Seal Zipper Reinforced double zipper ensures an airtight seal; Reusable and resealable for frequent filament changes. Self-sealing Valve Self-sealing for easy operation, this heavy-duty valve allows for ultimate air suction and secure sealed storage.   Reusable Humidity Indicator Cards Environmentally friendly cobalt-free humidity indicator card, indicating range 10%～60%. When the humidity in the environment around the humidity indicator card rises to a certain value, the corresponding indicator point on the indicator card will change from brown to light blue. When the indicator point becomes gray (between brown and light blue), the value in the indicator point is the current ambien