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

Set square yellow 15cm, 3D printed.
Black lines every 1 cm in the bevels. Additionally, notches per cm help you count when drawing.
A dot mark at 5mm.
Base with a notch in the middle.
3 holes for fixing with pins on the base.
45 and 90 degrees marked with dashed lines.

Material: plastic, thickness 2mm

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