The nozzles are a high-temperature carburized hard-formed hot-formed steel with good wear resistance and heat resistance, so they and meet your daily needs. Features - ColorAssorted Color - Material: Stainless steel, hardened steel, brass. - Size: 1.30X0.58X0.58cm/0.51X0.23X0.23 inch. - extruder nozzles are made of , it has the characteristics of high hardness and high toughness. - The shape is smooth and bright, and the lettering is clear so that you have a good distinction, nice workmanship makes sure a . - High precision: The inner wall of the 3D printer extruder nozzle is smooth and has no burrs, its viscosity coefficient is small, and extruder nozzle diameter error is less than 0.02 mm, providing you an accurate and smooth extrusion. - This nozzle has impressive toughness and hardness, not only suitable for common 1.75 mm 3D printer filaments, but also can be applied for printing filaments of carbon fiber, fiberglass, etc. - And the nozzle cleaning needles are very flexible and hard, easy to bend the needle into a nozzle and will not break. Package list: 30 x nozzles 5 x cleaning needles (with a storage tube)