PREMIUM MATERIALS These PLA 3D pen refills are made from 100% pure, eco-friendly PLA filament (polylactic acid). Safer, non-toxic, bubble-free, clog-free, and deliver smooth printing. EASY PRINTING Wide compatibility with FDM 3D printers and 3D pens. No edge deformation, consistent feeding, stable printing, clog-free, eco-friendly, ideal for indoor use. RECOMMENDED PRINTING TEMPERATURE 356 Fahrenheit to 428 Fahrenheit (180 Celsius ~ 220 Celsius). Diameter Tolerance: 1.75 +/- 0.05mm Color: Multicolor Material: PLA Size: 16ft = 5M Package Contents: 1 x 3D Pen Filament PLA Refills 25 Colors (25 colors will be sent randomly, specific color requests cannot be accommodated) Note: Only the above package content, other products are not included. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.