Model Number: VKS20170329002 Brand Name: Esun Key Specifications/Special Features: As a kind of 3D printing material, PCL is very suitable for 3D printing pens' use. It has three advantages compare with other materials been used in 3D printing pens.SafeThe melting point of PCL is 70℃-90℃, so it makes the nibs of 3D printing pens drop to about 40℃. Children can touch the nib without the risk of been burned.Environmental friendlyPlaced into the water or soil, it will break down into carbon dioxide and water six months later.RecycleAfter printing, collect the used material and put them into the water at about 60℃, then you can make a hand model like pitching the clay.