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. Lower retraction means time saved every time the extruder retracts. Over the course of a print, a few milliseconds here and a few there add up to a lot of time saved. for tube is far superior to the tubing supplied with most 3D printers. Its much smoother to feed filament through. And when printing it reduces the drag on the extruder giving a much smoother travel and print quality. Colour:Black+blue+gold+silver Material:metal Package Contents: 1 x 2m PTFE tube 3 x 0.4MM nozzles 3 x silicone tube cap 1 x PC4-M6 connector 1 x PC4-M10 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.