- Each batch is tested to meet the specifications for Lucidyne ColorScan® grade mark readers
- Superior color separation for accurate grading compared to competitive crayons
- Makes smear-resistant marks, reduces scanning errors
- Up to 14 fluorescent colors in three hardnesses for varying production environments
- Offered in 2 sizes: standard 11/16" (17 mm), hex shape 1/2" (13 mm),
- Made in U.S.A.