I threw this together to hold two passive switches on my desk.
NETmate is a common brand these appear under, but they may appear under different brands. There are passive switches in this form factor for USB, DisplayPort, HDMI, DVI, Audio, RS232 and even Ethernet.
I use a USB and DisplayPort switch as a sort of KVM, but the lack of weight to theses boxes means that they don't like to stay put if there is any pull from the cables. This keeps both boxes exactly where I place them.
These were designed to compliment my DAC Stand which is sized perfectly to let the cables from the two switches route underneath. This makes it easy to use my USB DAC, and the switches.
Recommended Material/Settings:
After printing, add rubber feet (6 recommended) to help avoid the tray from sliding on your desk.
The author hasn't provided the model origin yet.