Push together system.
Legs have feet.
Should be possible to breakdown into flat pack of 5 shelves and associated "posts".
Note that 1 shelf is just off the floor, and the 5th/top shelf is suitable for putting things on if you have the space in your shed/garage/workshop.
There are 5 sets of shelving. You don't have to take all 5.
I will add some measurements in a bit.
Black plastic 5 shelf system. (IP4)
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