The CY3R Cylinder - Magnetically Coupled uses industrial strength magnets located in the piston and external carriage to form a single unit that will travel when actuated with air pressure. The CY3R series has resin based lube retainers installed on the dust seal to more evenly distrubute lubricant for a reduction in minimum operating pressure. 70% longer wear rings will distribute a side load over a larger contact area for improved bearing performance. Please note the CY3R-N must be used with an external guide to support the load.