Huge spool of 1Kg PLA filament for your 3D printer or pen, they both work on either one as it has the most standard and mostt used sized of 1,.75mm diameter filament. It is in color blue reaching a deep dark hue and comes packaged nicely in a sealed plastic wrap and inside a box to make sure that there is damage when receiving it. With this spool, you will be able to create more than hundreds of things and have so much fun. It is non toxic since it is made from PLA, and it is safe for children and llittle ones to handle.