Size: 35 x 40 cm (11.81 x 15.75 inches). Suitable for 0.5 kg / 0.75 kg / 1 kg 1.75 mm / 2.85 mm / 3 mm filament. Please measure the size of the filament before purchasing, check whether your filament can be put in the bag. 3D printing materials are prone to moisture in the air. If these materials get wet, you would only end up with poor print quality and frustration. This Sovol 3D printer filament storage kit allows you to easily seal your 3D printing filaments vacuum tight, protect them from moisture and dirt, and monitor their moisture content to keep them in shape. Start your pressure without clogging and sticking problems. How do I store the filament properly with this Sovol vacuum bag? 1. Place the filament in the vacuum bag. 2. Place the desiccant, temperature and humidity display card in the bag. 3. Use the sealing clip to close the bag. We recommend trying several times to ensure the bag is completely closed. 4. Use the pump to pump the air out of the vacuum bag through the "blue hole" on the bag. 5. After confirming that the air has been pumped out of the bag, we recommend watching the moisture change on the moisture card. *Please note that we recommend pumping out the air from the bag when the humidity reaches 20% (the colour changes from pink to blue). If you have any questions or problems, please feel free to contact us. We will reply to you within 24 hours. Thank you.