Feature: 1. ALUMINUM ALLOY: The bicycle bearing headset kit is made of excellent aluminum alloy material, which is rust and corrosion resistant. 2. STANDARD SIZE: The bike headset has a standard size for a 44mm straight head tube frame with a 28.6mm standard straight tube fork. 3. GOOD SEALING: Built in oil seal waterproof technology, the oil seal is placed on the upper edge of the headset, and the headset cover is lighter. 4. HIGH PERFORMANCE: With sealed double bearing, has good waterproof, flexible rotation and silent infiltration, with stable performance. 5. GLOSSY SURFACE: Using CNC process, with anodized coloring, these headset bearing components have glossy surface, not easy to fade. Specification: Item Type: Bicycle Bearing Headset Product Material: Aluminum Alloy Product Model: DH-441 Product Application: Suitable for 44mm straight tube head tube frame, with 28.6mm standard straight tube front fork. Package List: 1 x Sunflower Assembly1 x Pressing Ring3 x Headset Cover Assembly