Shelf system improvements

A shelf kit comprising:

• a first plastic shelf having a perimeter about a first planar upper surface;
• a second plastic shelf having a perimeter about a second planar upper surface;
• at least four legs for use in connecting the first shelf to the second shelf, whereby the first shelf is maintained parallel to the second shelf in an installed configuration by the at least four legs;
• and at least one attachment selected from the group of a bin, a cable wrap, and a hook, said at least one attachment having a connector portion initially provided in an unattached configuration;
• wherein at least one of the first and second shelves has at least one attachment location formed into said at least one of the first and second shelves through a side wall of said at least one of the first and second shelves for selectively receiving the connector portion of the at least one attachment in an attached construction, with the at least one attachment extending cantileveredly from the perimeter of the at least one of the first and second shelves when connected to the at least one attachment location with the connection portion of the at least one attachment and the at least one attachment located no higher than the planar upper surface of the at least one of the first and second shelves;
• and
• wherein the second shelf has a different upper surface configuration with at least one more bin formed within the second Planar upper surface than the first planar upper surface of the first shelf, wherein each bin of the second shelf has a planar non-perforated bottom that extends below the second planar upper surface of the second shelf.