Feature 1、Good Features: Aluminum alloy frame, smooth pedaling, low noise, light weight while maintaining strength. 2、Precise Machined Thread: Premium aluminum alloy, strengthens lateral stability, is not easy to loosen, and rejects abnormal noise. 3、Ceramic Bearing: The ceramic bearing has high strength, impact resistance, wear resistance and heat resistance, light weight and smooth, efficient output. 4、Replacement Part: Bicycle bottom bracket is easy to install, you can replace the old or damaged parts to obtain higher strength. 5、Good Performance: High strength bike bottom bracket sealing performance. Great accessories for cyclists. Item Type: Bike Bottom Bracket Product Material: Aluminum Alloy, Ceramic Color: As Pictures Shown Weight: Approx. 120g / 4.2oz Product Size: Outer Diameter: Approx. 47mm / 1.9in Inner Diameter: Approx. 24mm / 0.9in Five Way: Approx. 86.5mm / 3.4in Package List 1 x Bike Bottom Bracket