This product is exactly as described. Works perfectly with the Raspberry Pi 3 & 4 with the RGB Matrix bonnet from Adafruit. The P4 pitch is the size Adafruit had with their Adabox 016, so all the 3D printable cases for that should work with this. I actually bought 2 of these and both work great. (Note I have a black acrylic diffuser on the matrix, which diffuses the pixels a bit in my picture.)
Excellent display to use in the clock ATMEGA32 project