[ & HEALTHIER MATERIAL]Compared to refills ABS/PLA 1.75mm, PCL filament with a lower melting temperature of 70℃ which eliminate the risk of burning hands. Besides, PCL filament refills are 100% derived from renewable plant resources, will not create pungent odor when infused into 3D pen, non-toxic, No odor, non-irritating and biodegradable [20 COLORS ] refill pack of 20 various colors scribble your 3D artistic masterpiece and make your masterpiece glow in the dark. A great 3d pen for kids and art lover to DIY what they want, and bring up kids to have with crafting and drawing [ULTRA-SMOOTH]PCL filament for 3d pen with Low temp releasing technology and high- PCL filament 1.75mm diameter your 3D drawing very smoothly without oily residues or bubbles, no clogging [UNIVERSAL COMPATIBILITY] with 3D Pens/3D Printers on market, Not suitable for pen [ENJOY THE of ]This 3D printing pen filament refills are gifts for kids to their spatial thinking, cultivate , and artistic skills. Also, a great way for parents and children to spend happy time , strengthening the bond PCL Filament Refills PCL Filament 3D Pen Refills PLA Filament Gold Silver Handles Tray Handles size:Length of each roll: 3.0m Material:PCL colour:Random Color 20 kinds of colors are random, can not to specify Package Contents: 1 x 3D Printing Pen PCL Filament Refills set Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.