Upgrade Extruder Assembled MK8 Hot End Kit with Bowden Tubing,also included are some extrabrass nozzles,hotend socks and heat blocks tubing: High Lubricity Additives make XS Series tubing the lowest friction Bowden tubing on the market. Less friction means more responsiveness, less retraction, more accurate prints, less slippage, wear, and tear on the extruder, and less clogging when printing chunky filaments such as some woodfills or ironfills. Three 0.4mm brass nozzle are also included with this kit,the kit can work with different sizes of MK8 nozzle: 0.2mm 0.3mm 0.4mm 0.5mm 0.6mm 0.8mm 1.0mm nozzle 3D Printer Heater Block Silicone Cover,helps to keep the hotend temperature extremely stable,can extend the life of the heater block and extruder by keeping it cleaner. Application: 3D printer 3/ 3 Pro Nozzle size: 0.4mm Cable length: 1.2m Heating Tube: 24V 40W Operating temperature range: -40~+260 Celsius (-40~+500 Fahrenheit) Colour:Black + red + gold Material:Aluminum + stainless steel + brass Package Contents: 1 x Assembled Extruder Hotend Kit 3 x 0.4mm Nozzle 4 x Heat Block 4 x Silicone Cover Only the above package content, other products are not included. Note: Light 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.