Helix Small Circle Template (37168) Reviewhttp://tinyurl.com/on376pe Helix Small Circle Template (37168) 39 circles in 1/64-Inch increments from 1/16-Inch to 1 3/8-InchMade from dimensionally stable .03-Inch green transparent shatter resistant plastic, overall size 4-Inch x 7 1/4-InchDesigned for use with a 0.5mm lead or pen tip; ink risers on reverse side prevent smudging when using inking pen
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