Everything on this page is a part for something else. Optional shelves for storage cabinets, hinged door sets and bases for bin units, wire shelves sized to specific rolling carts, dividers for wire containers and totes, and rails, frames, posts and drawers for wire shelving systems.
That matters when you order. These pieces are built for the unit they go into, not to a general standard. A shelf for a cabinet with standard doors is not the same part as one for a cabinet with louvered panel or pegboard doors, and each lid and cover is listed for the specific tote or bin models it seats on.
If you are putting a new setup together rather than adding to one, start on the storage cabinet, industrial shelving and wire container pages, then come back here for the add-ons.