• Brass nozzles: Most commonly used material for 3D printers, easy to machine and durable. Ideal for printing non-abrasive materials. • Smooth output: The inner wall of the nozzle has a low viscosity coefficient, which reduces resistance during filament extrusion and allows for faster 3D printing. • Premium material: Nozzles made of high-quality brass, with good thermal conductivity, high hardness, and long-term durability. They fit perfectly with the extruder kit, preventing material leaks during printing. • Cleaning needles: Sharp and good hardness tips, effective for cleaning the nozzle without damaging it. It is recommended to clean from the inside out and in a clockwise direction. • Includes: 20 Volcano brass nozzles and 5 cleaning needles. Output diameter: 0.4 mm. Input diameter: 1.75 mm. Output thread: M6.