【Keep Filament Dry】Using the 3D printer filament storage kit, you can protect your filaments from moisture, dust, odours, etc. The pressure condition is in best condition. | 【Large size and Durable Reusable】The size of the bag is 40x40cm. The thickened vacuum bag is made of high-quality PA+PE material, which is durable and reusable, safe and environmentally friendly. After vacuuming, it can be kept vacuum dry for more than one year. | 【Electric Seal】The storage bag can be connected with an electric pump. It requires 3 AAA batteries (not included). No manual extraction is required, the automatic pump is designed to automatically extract air from the vacuum bag easier and faster. | 【Easy to use】Put the filament in the vacuum bag(Desiccant can be put in at the same time), use the clip to seal the bag, connect the power supply of the vacuum pump, align the pump port with the suction valve of the vacuum bag and tighten it, and then start the button for air extraction. (Desiccant and filament are not included.) | 【What is included】Electric pump x 1, 40x40cm single roll bag x 4. Double seal with one sealer per bag, suitable for 0.5 kg 1 kg PLA / ABS / nylon / wood / TPU 1.75 mm 3.0 mm 3D printer filament.