INA slewing ring bearing 1. Four point contact bearing Series VLA VLI VLU(Light series 20) Series VSA VSI VSU(Standard series 20) Series VSA VSI VSU(Standard series 25) SeriesVA VI VU 2.Crossed roller slewing ring bearing Series XSA(standard series 14) Series XSI(standard series 14) Series XSU(standard series 14) Series XA XI XUz