Set square 20 cm, transparent with tactile and visual markings

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.
10 degree intervals for the parallels alternately colored yellow translucent.

Material: plastic, thickness 1.5mm

Shipping within 3-5 working days after after payment in advance by invoice, or directly after payment via PayPal.