Small transparent ruler with tactile markings

15cm ruler, for visually impaired people, transparent. 
Alternating translucent yellow every 1 cm.
Practical stop edge at zero.
Markings indicate every cm with a tactile line. A dot marks the 5mm intervals.
Along the bottom edge is a slightly rough gripping surface.
Material: plastic, thickness 2mm

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