GPIO board case. This one has an AMPSEAL cutout on one end, and the other end blank. You may drill a hole if using the stereo jack for serial communication, or use the AMPSEAL for that. Note that these cases are a bit of a tight fit – we recommend soldering the AMPSEAL from the top to get it started, with the board in the case, the endplates on, and the lid off. If you are using the stereo jack, you must drill the endplate. Color is black anodized.