Appropriate size: the inner diameter of PTFE tubing is . 2 mm/ 0.08 inch, the outer diameter is . 4 mm/ 0.16 cm, and the inner diameter of PC4-M6 and PC4-M10 pneumatic fittings is . 4 mm/ 0.16 inch, suitable for pipes with an outer diameter of 4 mm/ 0.16 inch, and a tube cutter is also included in the package, suitable size for 3d printer Reliable material: the MK8 socks are made of quality material, sturdy and durable, capable of withstanding heat and working normally at high temperature, which allow you to use for a long time and bring convenience to your use Practical tools: the PTFE tubing can be applied to upgrade the 3D printer, which can effectively reduce the friction when the 3d printer is working, improve the response speed, bring convenience and saving you time when printing wood chips or iron chips Wide compatibility: the 3D printer kit is suitable for printers such as -3s/-10/S and other 3D printers, and it is also equipped with a tube cutter in the package, so you can cut according to your own needs to more convenient to use Material:Metal + plastic colour:Gold+black+blue+white Package Contents: 1 x 1m blue PTFE tube 1 x 1m white PTFE tube 4 x PC4-M6 pneumatic accessories 4 x PC4-M10 pneumatic accessories 4 x MK8 black silicone sleeves 4 x 0.4mm brass nozzles 1 x pipe cutter 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.