Helix Geometry Shape Template Made from dimensionally stable 0.06" blue transparent shatter resistant plastic with matte finish to reduce glare Ink risers on reverse side prevent smudging Molded centerlines and printed labels and graduations for quick and accurate use Made from dimensionally stable 0.06" blue transparent shatter resistant plastic with matte finish to reduce glare ^Ink risers on reverse side prevent smudging ^Molded centerlines and printed labels and graduations for quick and accurate use