Dear friend, As a specialized manufacturer and exporter of slewing bearing for standard or non-standard applications in china. we sincerely hope to establish business relations with your esteemed corporation. Our products are mainly 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. If interested, please feel free to contact us. slewing.bearing( at) hotmail.com