High lubricity additives make our XS series tube the lowest friction bow tube in the market. Smaller friction means stronger reaction, smaller shrinkage, more accurate printing, less slip, wear and tear on extruder, and less blockage when printing thick wires, such as some wood fillers or iron fillers. Reducing back force means that every time the extruder contracts, it saves time. During printing, there are several milliseconds and seconds to save a lot of time. Capricorn tube is superior to most white PTFE tubes provided by most 3D printers. Make the filament feed more smoothly. When printing, it can reduce the resistance on the extruder and get a smoother stroke and print quality. PC4-M6 and PC4-M10 pneumatic connectors are made of brass with small metal teeth and can be tightly combined. Therefore, it does not leak filaments in the printing process. Upgrade the aluminum manual twist horizontal nut, the metal nut is stronger and tighten more than the plastic nut. Upgrade aluminum manual twist nut. These red aluminum nuts are Ender 3/3 Pro/3 X, Ender 5/5 Plus/ 5 Pro, CR-10, CR-10 V2, CR-10, X, 10, and Ender, , upgraded accessories. Material:aluminum colour:Blue+red+gold Package Contents: 4 * Manually tighten the nut 4 * Hot water bed spring 1 * 1.2 m Mori seat premium XS Bowden tube 1 * Large pneumatic connector 1 * Small pneumatic connectorOnly the above package content, other products are not included. Note: Light shooting 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.