This filament roll is designed for the Hamilton Buhl 3D Magic Pen. Measuring 980 feet, you will be able to let your creative mind explode freely. Each roll has a 1.75 mm thickness. You can choose between 6 different colors: black, blue, purple, green, red, and white. You will be able to bring to life any idea you may have: from dragons to butterflies or even a colorful rainbow. There is absolutely no limit to what you can create!