Features: Copper Alloy with High Thermal Conductivity High Flow for High Speed Printing: The thermal conductivity of copper alloy is as high as 330W/m-k, ensuring that the nozzle is heated more evenly. The volume is twice as large as ordinary nozzles, supporting high-speed printing speed of 600mm/s. Uniform Nickel Plating, Smoother Extrusion: The nickel-plated layer on the surface greatly reduce the adhesion of filaments to the nozzle and smoother extrusion. Copper alloy nozzle are suitable for most other FDM materials and PEEK, PEKK PEI, PSU, PPSU and other high temperature consumables. Hardened Steel Nozzle: High Hardness, More Wear-resistant and Longer Service Life. Hardened Steel Resists,Corrosion for Longer Service Life: Advanced heat treatment process and better anti-oxidation are combined to prolong the service life of the nozzle. What you get: 8pcs nozzles of different sizes. 2 x 0.4mm Copper Alloy Nozzle, 1 x 0.6mm Copper Alloy Nozzle, 1 x 0.8mm Copper Alloy Nozzle, 2 x 0.4mm Hardened Steel Nozzle, 1 x 0.6mm Hardened Steel Nozzle. Specification: Copper Alloy Nozzle Quantity: 4pcs Mohs Hardness: 6 High Temperature Resistance: 500 Thermal Conductivity: 330W/mk Inner Wall Roughness: Ra 0.4 Compatible Filaments: PLA, ABS, PETG, TPE, TPU, PC and most other FDM materials and PEEK, PEKK PEI, PSU, PPSU and other high temperature consumables Hardened Steel Nozzle Quantity: 4pcs Mohs Hardness: 7.8 High Temperature Resistance: 450 Thermal Conductivity: 22W/mk Inner Wall Roughness: Ra 0.4 Compatible Filaments: PLA, ABS, PETG, TPE, TPU, PC and most other FDM materials; composite consumables with grinding additives such as carbon fiber, glass fiber, steelwood, boron carbide, tungstenand phosphorescent pigments Package Size: 52 x 52 x 37.5mm / 2 x 2 x 1.4in Package Weight: 90g/3.1oz Packing List: 2 x 0.4mm Copper Alloy Nozzle 1 x 0.6mm Copper Alloy Nozzle 1 x 0.8mm Copper Alloy Nozzle 2 x 0.4mm Hardened Steel Nozzle 1 x 0.6mm Hardened Steel Nozzle 1 x 0.8mm Hardened Steel Nozzle