1U Meow Mixer 3-Channel Mixer Module 12HP Waveform DIY Project #7. This has some tricky things in the build. It's totally doable, but read the build guide before purchase. The instructions on how to build this can be found on our Build Guide page. Faceplate is black with silver.
All Waveform 1U modules as well as the Waveform 1U Cat Carrier Case use the Intellijel size format.