Features: LONG SERVICE LIFE: Adopting aluminum alloy, CNC high precision machining and fine workmanship, colorfast and anti-deformation, the sealing ring is good for keeping dust and water away to prolong service life. INTERNAL BEARING: The bearing headset is suitable for 44mm bike frame head tube with low friction face-seals on the crown races. Built-in stainless steel perrin bearing, better experience. Rotating flexibly with great lubricating effect. IDEAL FOR MODIFICATION BIKE: Can be applied for most bicycles' modification. With its surface electroplating polishig. SMOOTH ROTATION: This product has fine machining ensures sleek surface and smooth rotation, which fits perfectly with your bike headset. SERVICE GUARANTEE: If you have any questions about our products, please send us an email and we will get back to you as soon as possible within 24 hours to solve the problem for you. Specifications: Item: Internal Bearing Material: Aluminum Alloy Colour: Black, Red, Golden, Silver (Optional) Weight: Approx. 75 g Size: Approx. 3 * 5 * 5 cm / 1.2 * 2.0 * 2.0 inch Fitment: for 28.6 mm Front Fork Package Included: 1 * Internal bearing