Scale 30 cm

Scale  flat plastic.

Graduated in relief

• 1 small line every 5 millimeters
• 1 dash largest all centimeters (every centimeter is alternately yellow and black)
• 1 by line across the width of the rule every 5 centimeters.

On the other length

• 1 notch every 5 millimeters
• 1 dash all centimeters (chaquecentimètre is alternately yellow and black).

Under scale 6 skid pads are placed.