
I installed a couple of these racks in my home rack, one for AV gear and one for three heavy UPSs. The strength and stability of these shelves are very good. A shelf with three heavy blocks doesn't flex or bend at all (maybe I'm over the design limit, I'm not exactly sure) even though they are closer to the front and sides. Overall very happy with the durability. The only downside I have with it, hence the 4 stars, is that the "ears" and sides of the shelf stick out a bit - maybe a quarter of an inch into the shelf space - and certainly don't flex. The maximum width of equipment you can fit inside,

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