Select from four graphite grades from very soft to hard. Graphite Lumber Crayons are fade proof, water proof and smear proof. Can be applied to wet (green) lumber or dry wood, metal, concrete and most other surfaces. Hexagon shaped to fit lumber crayon holders. 4-1/2" x 1/2". One dozen per pack. Black only. Made in the U.S.A. 36$7.32, 6/$34.56, 12/$63.36, 24/$120.96Grade: 100 Medium200 Hard500 Very Soft512 Soft Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 488 or Internet Sales.