CHK12W Chalk-Non Toxic, #31144 White, 12 pcs. (PER BOX)

Makes clean distinct marks on chalkboards for maximum visibility and contrast, erases cleanly with no ghosting. 95% calcium carbonate, free of foreign materials that work their way into the board surface causing scratching, streaking and pitting. Round stick is 3-1/4" x 3/8" fits many chalk chucks. Certified non-toxic. Sold in 12 pc. box. Available in white or yellow.