This 3D Pen Filament refill pack includes 10 gorgeous colours so you can have a bigger color spectre for your creations in your 3D Pen. This can be a great gift set for a student, an art lover or to have fun carafting and drawing! These filaments are made of PLA (Polylactic Acid) that are odorless, smokeless and toxic free, yet being environmentally friendly. It works with ANY 3D Printing Pen using 1.75mm PLA filament. The temperature range for this product is 170℃-190℃ along with a tolerance of +/- 0.05mm;