Professional template with built-in ink risers. 41 circles with diameters from 2mm to 43mm, sizes from 2mm to 10mm in 0.5mm increments and from 11mm to 43mm in 1mm increments.
Made from dimensionally stable 0.8mm green transparent plastic.
Matte finish on one side to reduce glare.
Designed to use with a 0.5mm pencil lead.