Knox 3D Printing Pen with LCD Screen (Green) w/ 3D Pen Filament Refill (8 Colors, 260 FT) Draw 3D Objects in Plastic / Built-in LCD Display Compatible with ABS or PLA Filament Forward & Reverse Buttons / Stepless Speed Change Includes Filament Starter Pack & Pen Holder Bundle also includes: Knox 3D Pen Filament Refill- 8 Colors (260 Feet)