Set square 15cm yellow with circumferential markings per cm for blind people

Set square yellow 15cm, 3D printed
Black lines every 1 cm on all sides.
Additionally, notches per cm help you count when drawing.
3 holes for fixing with pins on the base.

Material: plastic, thickness 2mm.

Shipping within 3-5 working days after advance payment on account, shipping costs 4.19€ within Germany