Tips: Please make 3D printer filament is to be stored in a sealed bag or box after each print to prevent moisture. Be sure to insert the free end of the PLA+ filament into the holes to avoid being tangled for next time use. If there is no print plan within a few days, retract the filament to protect the printer nozzle. pla+ filament Reliability Trust all of your prints to SUNLU! We strive to make 3D printing an enjoyable and error-free process for our customers. That’s why each filament is carefully formulated and thoroughly tested to save you time and effort every time you print.