Given the particular problem of installing an audio rack frame (I work as a voice actor) into an existing bookshelf, I searched the internet for solutions. There was only one stand, just under 20" wide, designed for standard 19" recording equipment such as amps, compressors, etc. This Star Tech device is rock solid with good heavy gauge steel. There are no instructions, but if you live on planet Earth you can assemble this stand in minutes. Also, they give you a bag with more rack nuts than you could use. While these racks are not technically mountable, they mount flush to each other so I used soft vinyl bumpers to fold down the pair and that was no problem/high recommendation for this product. Dan
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