1. PCL material is a biodegradable material, non-toxic and tasteless, more suitable for children to use. 2. PCL can only be used for low temperature pressure pens. It is not resistant to high temperatures. 3. Extrusion temperature: 60-100C. 4. After adding pigments to PCL material, the colour is brighter and the impact resistance is PLA material. 5. PCL material is relatively easy to change the details of the work and can be changed directly with the help of hot water. Diameter: 1.75 mm. Diameter tolerance: +/-0.02-0.05 mm. Length of each colour: 33 ft (10 m). Total length: 656 ft (200 m). Extrusion temperature: 60-100C Compatibility: 3D low temperature PCL pressure pen. Weight: . 640 g. Colour:random color , 't accept the specified color Material:PCL Quantity: 20PCS Note: 1. Please make your low temperature uses PCL filament with 1.75mm diameter. 2. Store it in a cool and dry place for good maintenance. Package Contents: 1 set x 3d stift kinder Only the above package content, other products are not included. Note: Light reflection 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.