1. Lightweight and Durable: Made of high-quality aluminum alloy, strong and durable, with fine workmanship, lightweight and long-lasting. 2. Impervious and Dirt-proof: Sealed bearing with compact structure helps prevent moisture and dirt penetration, provides smooth lubrication and extended durability. 3. Exquisite Thread: Threaded lock design enhances side stability and resists loosening. 4. Convenient Installation and Operation: Hollow one-piece hanging design increases pedaling efficiency, reduces noise, and improves power transfer. Easy to install and operate. 5. Wide Application: Includes 3 resin washers. Ensures smooth rotation and easy setup. Compatible with frame bottom brackets measuring 68-73mm. Color: Gold/Black/Titanium Color Material: Aluminum alloy + plastic Package Contents: 1 x Threaded Bottom Bracket Note: Light reflection and differences in display screens may cause slight variations in color. Measurement error allowed within +/- 1-3cm.