Features： 1、Double Bearing: Road bike headset bearings sealed double bearing, good sealing, maintenance free, flexible rotation, low noise. 2、Oil Sealing Waterproof Technology: Mountain bike headset 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、Smoother Surfaces: Front fork stem headset bearing adopts CNC process, anodized coloring, smoother surfaces, not easy to fade. 4、Exquisite Craftsmanship: The bike front fork stem headset bearing is finely machined to ensure smoother surfaces for a fit on your bike. 5、Aluminum Alloy Material: Bike headset bearing is made of aluminum alloy material, which is rust proof and durable. Specification： Item Type: Mountain Bike Headset Product Material: Aluminum Alloy Product Model: DH-497F Product Application: Suitable for 44-49.7mm Tapered Head Tube Frame with 1.5inch Standard Tapered Tube Fork Package List： 1 x Sunflower Components 4 x Headset Cover Assembly