Here are the important bits:
- The shelf width is 48"
- The shelf depth is 16"
- The uprights (i.e. the vertical rail into which the shelf brackets are attached) are 25" tall which gives you a little less than 2' of space between your two shelves if you mount them at the extreme top and bottom of each upright
- This set is really 2 separate units each with 2 shelves. The picture just happens to show one unit mounted right on top of the other.
- The Amazon parts list is incorrect. This item comes with 4 uprights and not 2.I have two of these kits installed in my garage and they're great. They installed fairly easily with just a drill, a level, and some other small tools. I can only assume that the 300 lbs. max load per shelf is accurate because mine are totally loaded up with full cans of paint, washer fluid and other heavy items and they're showing no signs of sagging or pulling away from the wall.
You can buy most of the various bits and pieces of this system at certain hardware and home stores, but you'll be paying a lot more. The 16" shelf brackets alone (8 are included) usually cost $4-5 each.
