Features: brand new and high quality Use full sealing technology, excellent sealing for protection, no impurities, solves the problem of 3D printer filaments and other consumables directly contacting the outside, and extends the service life of 3D printer filaments. Simply put the spool in the bag, seal it with a sealing clip with the wet tape, and then use a hand pump to remove excess air. Moisture causes 3D printing filaments to cause series connection, clogging, poor adhesion, and layer shifts. Store the 3D filament in a dry bag to keep the filament dry. Note: The blue label cannot be torn off and will not affect normal use. Specifications: Material:Plastic Bags Size: approx 30x34cm or 11.81x13.38in Pump Size: approx 16.5cm or 6.50in Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 10 x Storage Bags 1x Hand Pump