30 colors PLA 3D printing pen core30 colors, rich colors, 3 meters for each color, add more fun and talent to your ingenious design High-purity imported raw materials, no waste and recycled materials, to ensure purity, and to ensure that the color of the printed body is bright. The wire diameter tolerance is stably controlled at 0.02mm, which is more conducive to the printing effect, and will not cause insufficient extrusion without clogging. Compared with ABS, PLA filament is a non-toxic, odorless, environmentally friendly and biodegradable material. It can be used safely by children, adults and professionals. The child is safer, and the mother is more at ease. Applicable equipment: All 3D printing pens and 3D printers with a diameter of 1.75mm on the market.