We are the manufacturer of slewing bearing in China, which mainly include below items: 1. Single-row four-point contact ball series. 2. Single-row crossed roller series. 3. Double-row ball series. 4. Three-row roller series. Our bearings are made of high-quality bearing steel, processed by heat treatment and precision grind, and are filled with a long service life, high-grade and multi-purposes grease. If interested, please feel free to contact us. Thank you! slewing.bearing@ hotmail.com