Compass aid 10 cm transparent with tactile markings

Practical compass aid for visually impaired people, transparent and translucent yellow.
5mm hole spacing, suitable for ballpoint pens. A smaller pin hole at zero.
Scale with tactile lines per cm. A dot marks every 5 mm.

Material: plastic, thickness 1.5mm

Shipping after advance after payment in advance by invoice, or directly after payment via PayPal.