[ & 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-precision PCL filament 1.75mm diameter your 3D drawing very smoothly without oily residues or bubbles, no clogging[UNIVERSAL COMPATIBILITY]Compatible with 3D Pens/3D Printers on market, Not suitable for pen[ENJOY THE of ]This 3D printing pen filament refills are excellent gifts for kids to improve their spatial thinking, cultivate , and artistic skills. Also, a great way for parents and children to spend happy time , 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 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.