The moisture meter can quickly measure the moisture content of the grain. 1. Prevent oxidation: It is known that all consumables for 3D printers absorb water from the gas, which can cause oxidation of consumables, leading to stress, clogging and poor adhesion. Our bags use double vacuum seal to completely remove all gas and prevent water from affecting 3D prints. 2. Perfect storage flexibility: Our vacuum bags can hold up to 2 rolls in 1 bag or only 1 roll in 1 bag, giving you the flexibility to store your chosen filament. 3. Comes with a hand pump: Our vacuum kits can be used with any conventional gas removal vacuum cleaner. That said, all of our bags come with a free hand pump that allows you to expel gas. 4. High compatibility: This 3D vacuum bag is designed for consumables for 3D printers and is compatible with all consumables in rolls of 0,5 kg, 0,75 kg, 1 kg, 2 kg and consumables of 1,75 mm, 2,85 mm, 3 mm. 5. Applicable scenarios: This vacuum bag can be used not only for 3D printers, ale also for storing food, pet supplies, clothes and other materials. . SET OF VACUUM BAGS WITH HAND PUMP . SET OF VACUUM BAGS WITH HAND PUMP Specification: Item Type: 3D Printer Filament Storage Bags Material: PE and PP Size: approx. 34 x 30 cm / 13,39 x 11,81 inches Compatibility: compatible with all consumables for spool 0,5 kg, 0,75 kg, 1 kg, 2 kg and consumables 1,75 mm, 2,85 mm, 3 mm . SET OF VACUUM BAGS WITH HAND PUMP . SET OF VACUUM BAGS WITH HAND PUMP List of packages: 10 x Vacuum bag 1 x Hand pump 1 x klips sealing Note: Manual measurement may have an error of 0-1 cm. Directly for use. . SET OF VACUUM BAGS WITH HAND PUMP . SET OF VACUUM BAGS WITH HAND PUMP