· 【CR original accessories 】compatible with Ender 3, Ender 3 pro, Ender 3 Max, Cr-10, Cr10s, Cr10 v2, Ender 5, Anycubic i3, and other Bowden Drive based 3d printers.· 【Fine workmanship】 inner diameter : 2mm, outer diameter : 4mm, and the 175mm filament can pass through the Teflon tube unimpeded to achieve the smoothest extrusion effect.· 【High temperature resistance】TheTeflon tube can withstand the maximum working temperature of 260 ℃, so you don't need to worry about it melting and deforming under the high temperature of the printer and damaging your printers.· 【More nozzles】We've added 4 sized matching nozzles to our Teflon tube kit so you're ready to use.· 【Professional after-sales】We provide professional after-sales customer service. If you have any questions during installation and use, please contact us.