SparkFun COM-08746 Button Pad 2×2 Top Bezel
This is a black plastic bezel, custom made to mate with the silicon rubber pads. Black 1/8" ABS plastic. We use four 4/40-0.5" size screws matched with plastic standoffs to attach the 2×2 button pad and Simon project boards. Using two of these bezels with two of the bottom bezels will create a 4×4 bezel appropriate for the full button pad.