Enabling you to see your thoughts and concepts engineered into a real and rewarding reality. The 3D pen filaments are universally designed and compatible with 3D printing pen using. The 3D pen is simple to install and easy to use, bring much convenience to you. Features - Material: Plastic. - Size: 1000.00X0.15X0.15cm/393.00X0.06X0.06inch. - Great artwork starts with excellent refills, 3D pen is super smooth. - It is made of , and , excellent and great, serving for long time. - It compatible for almost all 3D printing pens in the market. The outstanding performance enables you to make completely different world through your creative skills. - 3D printing can attract baby's attention, reasonably stimulate the development of eyes and brain, and develop the three-dimensional space of your baby. - Professional refills not just for children playing. It will keep your craft art work for long time without fading. Package list: 20 x 3D Pen Filaments