The inner wall of the nozzle is smooth and has no burrs with good touch, it's viscosity coefficient is small, help to provide you an accurate and smooth extrusion.Are you looking for products with reasonable prices? Are you looking for a sturdy, and reliable 3D printer nozzle kit that can complete multiple tasks? , our products will be your choice! Our 3D printer nozzle kit will meet your needs. Features - Color: Assorted Color. - Material: Brass + Hardening Steel. - Size: 1.30X0.58X0.58 cm/ 0.51X0.23X0.23 inch. - Our 3D printer nozzles are made of high- brass, good abrasion resistance, heat resistance. - 3D printer nozzle anti-leakage and anti-blocking design prevent printed material from leaking or blocking. - The 3D printer nozzle suitable for any 3D printer using accessories. - Possesses 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm size, sufficient quantity to facilitate your timely replacement, achieving printing. - This nozzle has impressive toughness and hardness, not only suitable for common 3D printer filaments, but also can be applied for printing filaments of carbon fiber, fiberglass, etc. Package list: 15 x 3D Printer Nozzles