High-Quality Metal Construction : Engineered from premium metal to ensure durability and resistance against rust and wear, ideal for long-lasting performance. Anti-Rust & Waterproof : Protect your bike's components from corrosion and water damage with our specially treated bearings designed for all weather conditions. Multi-Use Compatibility : Perfectly suited for most bicycles, including mountain bikes and lowrider bicycles, making it an essential addition to your maintenance kit. Easy Replacement & Installation : Designed for hassle-free installation, allowing quick and efficient replacement without the need for specialized tools. Includes 4Mm Steel Balls : Our bearings come equipped with precision 4mm steel balls, ensuring smooth operation and reduced friction. Experience unparalleled cycling comfort and safety with our top-tier bicycle bearings, meticulously crafted to withstand the test of time. From rugged mountains to urban streets, we've got you covered.