Planes for spit protection panel

Having seen that Swiss pharmacists/cashiers use protective panels to protect themselves from sputtering, I provide plans to make one using a 3D printer and a LASER cut-out.

square.stl
to be printed in 3D in 4 copies The screws are 5 mm.

panel.dxf
to be cut by laser or saw and drilled according to the plan.

IMPORTANT INFO
I have no knowledge of medicine, and the relevance of such a device remains to be confirmed!