1、Product Application: Bike headset is suitable for 49.7mm conical tube frame with 28.6mm standard straight tube front fork. 2、Fine Processing: CNC process, anodized coloring. Smooth surface, not easy to fade. Fine processing ensures a smooth surface that perfectly fits your bicycle. 3、Aluminum Alloy Material: Bike front fork bowl set is made of aluminum alloy material, which is rust resistant, sturdy and durable. 4、Double Bearing: Sealed double bearing, waterproof and maintenance free, sturdy and easy to use, with flexible rotation and silent infiltration. 5、Perfect Fit: Bike headset closely fits the original hole position with accurate shape and size design, having less stuck situations during use. 1 x Sunflower Component 4 x Headset Assembly  Item Type: Bike HeadsetProduct Material: Aluminum AlloyWeight: Approx. 117g / 4.1ozProduct Application: Suitable for 49.7mm straight pipe frame with 28.6mm standard straight pipe front fork