Feature:1. Good Sealing: Road bike headset bearings sealed double bearing, good sealing, maintenance free, flexible rotation, low noise.2. Good Waterproof: Bike bearing bowl group adopts oil sealing waterproof technology, placing the waterproof oil sealing on the edge of the upper bowl of the headset set, which is light and thin.3. Aluminum Alloy Material: Mountain bike headset is made of aluminum alloy material, which is rust proof and durable.4. CNC Process: Front fork stem headset bearing bowl group adopts CNC process, anodized coloring, smoother surfaces, not easy to fade.5. Smoother Surfaces: The bike front fork stem headset bearing is finely machined to ensure smoother surfaces for a perfect fit on your bike.Specification:Item Type: Mountain Bike HeadsetProduct Material: Aluminum AlloyProduct Model: DH-497BProduct Application: Suitable for 49.7mm Straight Tube Head Tube Frame with 1.5inch Standard Tapered Tube Front Fork Package List:1 x Sunflower Components1 x Bearing 1 x Gasket4 x Headset Cover Assembly