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This is a two piece 3D printed case for the Bit-c128 DAC device. The board simply is placed in the bottom half of the case, and the lid is affixed to from the bottom using the supplied screws. You'll need a 1.5mm allen key to remove and replace the screws. This too is available in our shop. http://corei64.com/store/products.php?43
Here is a bit of information about the device from the developers website.
The BIT-C-128 Video DAC with a Gonbes video converter and power adapter is the cheapest and easiest combination to display high-quality 80-column video from a Commodore 128 or IBM CGA on newer VGA displays, including lightweight LCD flat panels.
Designed especially for Commodore 128 and 128D computers, the BIT-C-128 Video DAC has been carefully tuned to match the colors on the Commodore 1084S-D display and designed for manufacturing using modern design tools and surface-mounted components.
This is for the case only. The device itself can be purchased from http://www.bit-c128.com