Enhance the performance and durability of your bicycle with this high-quality metal headset bearing, designed for mountain bikes and road bicycles. Crafted from premium metal material, this bearing offers exceptional strength, wear resistance, and anti-rust properties to ensure long-term reliable use. Suitable for common full hidden, semi-hidden, and external headset bearings, it provides versatile compatibility to meet various bike maintenance needs. Key Features: · Premium Metal Construction: Made from high-grade metal, delivering excellent durability, corrosion resistance, and wear protection for extended service life. · Wide Compatibility: Compatible with full hidden, semi-hidden, and external headset bearing types, offering flexible application for different bicycle setups. · Multiple Sizes Available: Choose from five different sizes to perfectly match your specific headset bearing requirements. · Sealing Rubber Ring: Equipped with a sealing rubber ring that effectively prevents water and dust ingress, protecting the bearing and enhancing longevity. · Ideal Bicycle Accessory: A perfect replacement or upgrade part for mountain bikes and road bicycles, ensuring smooth steering and improved riding experience. Specifications: · Material: Metal · Color: As shown in the picture · Size Options (L x W x H):  - 41 x 30.2 x 6.5 mm (1.6 x 1.2 x 0.3 in)  - 41.8 x 30 x 6.5 mm (1.6 x 1.2 x 0.3 in)  - 47 x 34 x 7 mm (1.9 x 1.3 x 0.3 in)  - 49 x 37 x 7 mm (1.9 x 1.5 x 0.3 in)  - 52 x 40 x 7 mm (2 x 1.6 x 0.3 in) Package Includes: · 1 x Bicycle Headset Bearing Note: The inner ring color of the bearing is random. This durable and versatile headset bearing is an essential accessory for maintaining optimal bike performance, offering protection against environmental elements and ensuring smooth steering control on every ride.