Helix Circle Template

Made from dimensionally stable, green, transparent, shatter-resistant plastic. Fractional inches with decimal and mm equivalents listed. Ink risers on reverse side prevent smudging when using inking pens. Center lines are printed around cutouts. Contains 10 circles, diameter size 1-1/2 in. to 3-1/2 in. in varying increasing increments. Overall size: 6-3/4 in. x 13-1/4 in.