2x4basics 90124 Custom Shelving and Storage System Shelflinks, Black Black 20376 1216 pack. Lumber not included Customizable shelving, can be modified or expanded as storage requirements change 16" deep shelves made of heavy gauge structural resin All hardware is included, assemble with only a screwdriver Only straight 90 degree cuts, no miter or angle cuts necessary The Hopkins 90124 2x4basics ShelfLinks Custom Storage System offers an easy fix to custom shelving. All the hardware is included, just add the size lumber you want