Features: 100% brand new and high qualityThe MK8 extruder nozzles are through long-term testing to solve the problem of plugging and missing materials to the greatest extent, low thermal conductivity, resistant to corrosion, high abrasion resistance.Also these 3D printer extruder nozzles 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.The inner wall of the MK8 nozzles 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 extrusion7pcs set with wrench, sufficient quantity to facilitate your timely replacement, achieving quality printingProvide around nozzles in multiple sizes for different speed/precision combinations to find your ideal fit. Package Includes: 1 Set/7Pcs MK8 Nozzles Specifications: Material: SteelSize: 13mm x 6mmColor: BlackFilament: for 1.75mm fialmentScrew Diameter: 6mmType: MK8 Steel NozzlesNozzle Diameter 0.2MM 0.3MM 0.4MM 0.5MMQuantity: 7pcs note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand.Please allow 0-1cm error due to the manual measurment.