This is a z-axis spacer for the Monoprice Select Mini V2 printer when installing a 3mm thick glass print bed. This does NOT require any disassembly of the printer
...Plus to install. To install, manually move your printer nozzle UP on the z-axis about 3/4". Snap this model (thicker side down) around the black box that you can see through the small gap.
Now home your printer axis, this should lift the z-home 3mm higher. I've additionally added an STL file for those needing 3.5mm of offset.
I personally use this one https://www.amazon.com/dp/B075XJ5ZP1/ref=cm_sw_r_cp_apa_esLHAbESGRX0P
It's the "130mm x 160mm Borosilicate Glass Plate Bed Flat Polished Edge w/ Corners Cut for 3D Print" by "GO-3D PRINT"