Features: Vacuum storage kit, which is used to protect your 3D printer filament, especially those with high water absorption, such as Nylon, PVA or other filament. When the filaments are opened and not used up, it will absorb moisture and directly affect your printing quality. Vacuum storage kit will help to store your filament in the right way. BPA free & FDA approved vacuum bag, dust and moisture proof, strong sealing. Hand pump and vacuum bags are reusable, environment-friendly and money-saving, easy to use. The humidity indicator has high sensitivity and can be used repeatedly, so you can know the humidity of 3D filaments at any time. Humidity indicator is reusable after drying. Sealing air valve and double sealed zipper for air tight protection. The vacuum set is widely designed for 99% FDM 3D printing filaments, it can be used for eSUN and other FDM brands. Specifications: --Hand Pump Material: ABS + Silicone Item Size: 16.5 * 3.5 * 3.5cm Item Weight: 50g Suction Power: 8L/Minute --Vacuum Bags Material: PA+PE, BPA Free & FDA Approved Size: About 33 * 40cm Thickness: 0.085mm Use Times: 50 Times Storage Temperature: -20 to 85 Package Size: 34.7 * 13.7 * 5.5cm / 13.7 * 5.4 * 2.2in Package Weight: 496g / 17.5oz Notes: Please read the user manual carefully before using. Please put the desiccant in the vacuum bag. (desiccant is not included.) Due to manual measurement, the deviation of 1-5mm is normal. Packing List: 1 * Hand Pump 10 * Vacuum Bags 2 * Sealing Clips 15 * Humidity Indicator Cards 1 * User Manual(English)