Ultimate Durability: Unparalleled hardness and wear-resistance, ensuring long-lasting performance against abrasive fiber filaments and providing more precise filament control. Optimized tooth shape and more even filament flow result in a smoother outer wall of the prints. Spur Gear: Self-Lubricating Brass - Provides enhanced wear resistance and a longer lifespan. 5-Spoke Design - Reduces moving mass and inertia, improving positional accuracy for . MoS2 Grease Included: Excellent lubrication performance provides longer gear life with silky smooth extrusion. Compatibility:For A1 A1 MINI printers. Colour:Gold+Silver Material:Hardened Steel+Brass+Aluminum Alloy Package Contents: 1x hardened steel gear 2x bearings 1x molybdenum disulfide grease Only the above package content, other products are not included. Note: Light reflection 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.