About this commodity Reduce replacement frequency-super durable, high-quality bearings are designed to survive in the worst conditions, reducing maintenance costs and replacement frequency. High speed support-limit speed support minimizes wear and protects bearings from early failure and collapse. These bearings are designed to withstand high pressure. Made of high-quality chrome-plated steel, double seal, manufacturer's pre-lubrication/lubrication, low friction coefficient, Stable performance [easy to install] from the factory Pre-filled and lubricated, it can be installed directly from the package, and the outer ring screw is convenient to use, which simplifies the installation procedure, reduces the installation time and avoids the trouble in maintenance. Product use: ideal choice for rotating machinery such as motors, pumps, fans, generators, gearboxes and engines. Commonly used in industry, automobile, agriculture, construction and other applications. Guarantee complete satisfaction: We provide all products with a 6-month quality guarantee. If there are any quality problems within 6 months after purchase, please contact us directly.