[PTFE Tubing] 100% Bowden PTFE tube with low friction for improved responsiveness, reduced retraction, more accurate prints, less filament slippage, reduced wear on the extruder, and minimized clogging when printing with thick filaments. Includes one tube cutter with an extra blade. [0.4mm Nozzles] Precision CNC-machined with one-time forming technology to ensure a smooth, burr-free interior for consistent and smooth filament flow. [Upgraded Pneumatic Fittings] Includes two PC4-M6 couplers for the extruder and two PC4-M8 couplers for the hotend, designed for durability and secure connections. Four collet clips are included to prevent Bowden tube slippage during extrusion or retraction. [Bed Leveling Springs] 4pcs upgraded bed leveling springs made from high-quality material resistant to fatigue and heat. Allows for higher print speeds with improved bed stability. (Note: Springs are approximately 25mm long. May require trimming or bed height adjustment for compatibility with certain models.) Material: Brass, metal Color: Blue + gold Package Contents: 1 set * printer accessories Only the above package content is included; other items are not part of this package. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.