Features: 1. Safe for kids: PLA material is more Safe for 3D Printing,Smokeless and Toxic Free 2. Value for money: Given the quantity and the quality of the 3D Drawing Pen Refills, you get what you paid for 3. Premium quality: 100% Virgin PLA plastic that causes no bubbling issues and that solidifies quickly allowing you to add minute details to your creation easily 4. Smooth PLA filament: 3D Printing Filament that feeds smoothly and constantly without clogging the nozzle. Works best between 320°F - 356°F (160°C-180°C) 5. Strong Compatibility: Universal Compatible with Various 3D Pens/3D Printers on market 6.12 Transparent Colors:12 random colors PLA filament to scribble your 3D artistic masterpiece idea PLA VS ABS 1.As an organic material, PLA Filament takes slightly longer to cool than the ABS alternatives. However, once cooled, this three dimensional printing plastic is completely rigid and less prone to warping than many of the alternatives, so you can print without a heated print bed. 2.PLA can be composted at commercial facilities.ABS which is derived from fossil fuels. 3.Unlike ABS, PLA can be sanded and machined. 4.PLA has a lower melting temperature. 5. As a material, PLA has much less warping versus ABS. 6. PLA can be printed at higher throughput speeds. Specifications: 1.Material: PLA 3D Filament( Polylactic Acid) 2. Diameter: 1.75mm 3. Diamter Tolerance: +/-0.05mm 4.Printing Temperature: 160°C-180°C 5.Quantity: 12 colors 16.4 feet(5m)/pcs 6.Total Length: 197 feet Package includes: 12 x 3D Pen Filament Our products have been tested carefully before sending out. Please rest assured to order. Any problem please feel free to contact us.We will help you to solve it till you satisfy.