Set square 20 cm, transparent with tactile and visual markings, 2-coloured

Set square for visually impaired people, transparent.
Right and left sides contrast in yellow and magenta.
Angles in 10 degree increments and tactile markings.
45 and 90 degrees are marked with dashed lines.
1 cm intervals for the parallels alternately translucent colored.

Material: plastic, thickness 1.5mm

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