Enhance your 2-tier or 3-tier Elite Series Mass Storage System with this bumper plate and medicine ball shelf. Designed to meet the needs of your workout routine, this shelf provides 70" of additional weight storage, supported by two 40mm steel rails spaced 7" apart. It expands your base model storage system into a more comprehensive home gym unit. The shelf easily attaches to the uprights of your base model storage unit with the provided installation hardware, making setup easy.