Double Seal ZipperMoisture-proof & dust-proof to ensure the quality of 3d printing filaments. |
PE+PA Composite MaterialStrong and durable,safe and do no harm to environment. |
Sealed Air Valve DesignPrevent air leakage and avoid moisture in 3d printer filament. |
Lightweight Hand PumpEasy to pump, can fastly darin the air within 30s. Save time and effort when pumping. |