[SAFER and HEALTHIER MATERIAL]Compared to 3D pen filament refills ABS or 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 percent 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 ]3D pen filament refill pack of 20 various colors scribble your 3D artistic masterpiece idea 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 fun with crafting and drawing[ULTRA-SMOOTH]PCL filament for 3d pen with Low temp releasing technology and high-precision PCL filament 1.75mm diameter ensure your 3D drawing very smoothly without oily residues or bubbles, no clogging[UNIVERSAL COMPATIBILITY]Compatible with most 3D Pens or 3D Printers on market, Not suitable for 3Doodler pen[ENJOY THE FUN of CREATION]This 3D printing pen filament refills are excellent gifts for kids to improve their spatial thinking, cultivate creation, imagination and artistic skills. Also, a great way for parents and children to spend happy time together, strengthening the bondPCL Filament Refills PCL Filament 3D Pen Refills PLA Filament Gold Silver Handles Tray Handlessize:Length of each roll: 3.0mMaterial:PCLcolour:Random Color20 kinds of colors are random, can not choose to specifyPackage Contents:1 x 3D Printing Pen PCL Filament Refills setOnly the above package content, other products are not included.Note: 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 1-3cm.