Features : Do you like DIY or make a beautiful artwork for your children and friends? Choose the AKNMSOY 3D PEN FILAMENT is good idea. 1. Safety: PLA materials are safer for 3D printing, smokeless and non-toxic 2. High quality: 100% PLA material will not cause foaming problems, and it will solidify quickly and smoothly, without blocking, allowing you to add details easily. 3. Great value: For better quantity 3D drawing pen refills, it exceeds your expectations Specifications: Material: PLA 3D Filament( Polylactic Acid) Diameter: 1.75mm (+/- 0.05 mm) Total Length: 3m*12pcs Printing Temperature: 160°C-180°C Package: color x 12 colors Package Contains: 12pcs PLA materials