The SMAI Portable Bumper Plate Storage Stacker is a simple storage solution for your Olympic bumper plates. Featuring a single stacker design, best used for storing large quantities of a single weight of bumper plates. Featuring a rock-solid structural design to keep your weightlifting bumper plates neatly stored and ready to access where ever you need them. Best used as a storage unit for a may pairs of the same plate size, simply use a new stacker for each bumper plate size that needs storage