Unique 20 colors: 3D printed PLA filament is made of 100% environmentally friendly material, including 18 solid colors, 1 fluorescent color and 1 metallic color, providing you with more choices Safety and high quality: High quality material filament is non-, environmentally friendly, brightly colored, bubble-free, and rapid prototyping. It is an excellent choice for children Wide compatibility: 1.75mm universal wire, which can be widely compatible with various 3D printing pens and 3D printers. Tip: Not compatible with pens with 3.0 mm filament. Easy to print: filament uses a printing temperature range of 350 Fahrenheit-420 Fahrenheit, which can be quickly formed without cracking or blistering, and will not block the output port, providing you with a better product experience colour:Multicolor Material:PLA size:Length about: 5m Package Contents: 1 set x PLA Refills 20 Colors (20 colors are random, no specified colors can be ) Only the above package content, other products are not included. Note: Light 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 +/- 1-3cm.