This is a canned food storage rack from Shelf Reliance. It is adaptable to store all size cans and works on the first in first out principle so your food is always rotated and fresh I stored as small as condensed soup cans to the large 1 gallon cans. This unit came with many extra spacer bars so it can be tailored to your can storage needs. I used it several years and now the kids are moved out and I needed my office uncluttered. The 2 of us don't eat that much anymore. It assembles with a plastic or wood dead blow hammer and includes all of the original parts including the assembly instructions. I bought mine with a very convenient ball bearing slide out drawer on the bottom. This is wonderful for preppers or even just a large family that wants to keep more on hand than a few cans in the pantry. I utilized the top shelf for jars and other non can items.