These NSF Approved shelving unit adjusts and expands easily to cater to all storage needs. The open wire construction reduces dust build up and allows air and light penetration. Easy slide-off shelf surface permits full access to inventory. These type 304 stainless steel shelving units are easily assembled, adjust without tools and align at 1a increments on numbered post. Add-On Unit includes 2 posts with leveling feet, 4 shelves, snap-on sleeves and 8 S-hooks to join units.Global Industrial