High Flow Nozzle Kit - Nozzle head made of Chrome Zirconium Copper, long service life; The thermal conductivity of copper alloy is as high as 330W/m-k, ensuring that the nozzle is heated more evenly The volume is enlarged supporting a high-speed printing speed of 600mm/s. Wear Resistance & Heat Resistance - Copper alloy is heat resistant up to 500C, while hardened steel is heat resistant up to 450C. No Clogging - Smooth inner wall without burr on the orifice for smoother feeding. With the Rac Less than 0.4 roughness, the inner wall enhances the fluidity of the filament and brings super smooth extrusion. Tight Fit, No Leakage - A flat surface and intense joint effectively solve the leakage problem. Multi-aperture Diameter Available - 0.4mm, 0.6mm, 0.8mm meets different requirement Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Silver Material:Chromium Zirconium Copper Package Contents: 2 x 0.4mm nozzles 1 x 0.6mm nozzle 1 x 0.8mm nozzle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.