Enabling you to see your thoughts and concepts engineered into a real and rewarding reality. The filaments are universally designed and compatible with 3D Printers using 1.75mm diameter . Less warping Easy to use No heated bed required . Feature - Color: Assorted color. - Material: - Size: 500.00X0.17X0.17cm/196.50X0.07X0.07 inch. - Great artwork starts with excellent Refills - Differs from ABS material, 3D pen is super smooth and far from annoying bubbles when it heats up. - Achieve Your Creative Imagination: refills melt quickly at 160 - 180 degree centigrade provided by the 1.75 mm head of 3D pen, and run smoothly. - It compatible for almost all 3d printing pens in the market. The outstanding performance enables you to make a completely different world through your creative skills. - Colorful 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 off the paper easily and will keep your craft art work for a long time without fading. Package list: 30 x 3D Pen Filaments