TheY-Axis plate is the lower part of the two part Y axis set. You will also need the Bed Plate and additional hardware listed below for Prusa Mendel and MendelMax 3D printer builds.
The Y-axis plate has tapped holes for standard Boltable PLA bushings and wider holes for Pillow Block Bushings. This is also compatible with any bushing holders that match the mounting holes of the standard Boltable PLA bushings.