1. The integrated shaft design ensures better concentricity of the gears, reduces eccentric rotation due to assembly, and promotes more even filament feeding. 2. Helical gear design provides improved meshing performance, smoother transmission, and more consistent linear force delivery. The increased contact area and longer meshing duration reduce stress, enhancing load capacity and extending gear lifespan. 3. Constructed from high-strength mold steel with a nano-coating surface treatment. The gear has a Rockwell hardness (HRC) of 62–65 and a surface hardness (HV) of 1000–1200, ensuring high strength, wear resistance, and corrosion resistance, while improving load capacity and durability. Name: Nano Coating Extrusion Head Gear Kit Compatible Models: for FLASHFORGE Adventurer 5M Processing Technology: CNC Color: White, Silver, Black Material: Steel + Nano Coating Package Contents: 1 x Extrusion Head Gear for AD5M 3D Printer Note: The package includes only the items listed above. Light reflection and display differences may cause slight variations in color compared to the actual product. Measurement may vary by ±1–3 cm.