This nozzle cleaning pack contains 35 long and durable needles that can help you clean your 3D printer nozzles. The needles are made of stainless steel and have high strength. They can be kept in the nozzle permanently or recycled and any debris or thread residue removed. Includes five different needle sizes: 0.2mm, 0.4mm, 0.6mm, 0.8mm. Each size has a different color selection for easy identification. Customized with most 3D printers on the market, such as MK8, MK10, E3D, etc. Consider a plastic tube with a screw cap to keep your remains organized and safe. Nozzle disconnect pack is an effective solution to eliminate nozzle disconnection and print expiration.