Single Gang Box Spacer (Outlet or Switch)

Simple spacers for a single-gang outlet box, either an outlet or a light switch.  This is a simple remix of @jepa2019's original model with the following thicknesses: 3mm, 2mm, 1.5mm, and 1mm.

The original design by jepa2019 had 4mm, 5mm, and 6mm, but for a few of my outlets I needed different sizes.  This is the same design and geometry of the original, I just reduced to: 3mm, 2mm, 1.5mm, and 1mm.