This caged technology employs a synthetic resin cage with a patented curvature that cradles each ball and separates it from the next one. The spaces between the rolling elements retain grease and act as a lubrication system. The incorporation of the technology in this new guide eliminates the need for frequent lubrication and results in long-term maintenance-free performance. The low particle generation of this design makes it ideal for precision equipment applications. The cage features minimal rolling resistance and four-way equal load ratings. Heights range from 6.0 to 6.5 mm, block widths are from 12 to 17 mm.