Sturdy wire rack.  FYI, this is TWO 3-tier racks placed on top of each other.  You can save a ton of money by buying the 6-tier instead of two 3-tier racks, which I did.  The sliding 'dividers' are pretty useless and soup cans can be a tight fit on the lower shelves.  I wired the shelves to the frame to make it more sturdy and easier to move.  But, all in all I would recommend these racks and will probably be back for more as I organize my pantry storage.