Everyone should have one of these. Wonder how I got along without this. How often have we counted each U while running a finger down the rack? This makes “Getting it right and being sure” so much easier. Just makes for a lot less to think about.
![IT Rack Ruler IT Rack Ruler](https://i0.wp.com/ecx.images-amazon.com/images/I/41PIyr%2BZ3TL.jpg?resize=500%2C125)
Also has some math that IT people racking gear often reference.
![Common equations needed when racking gear Common equations needed when racking gear](https://i0.wp.com/ecx.images-amazon.com/images/I/41b-VQgQtbL.jpg?resize=500%2C108)
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