Nihon Rikagaku Dustless Eye 4 72 pieces Chalk, Colors, DCI-72-4C,

[Dimensions] 1.12cm x 6.3cm [Materials] Chalk body: Calcium carbonate, scallop shell powder; Divider: PET [Quantity] Dustless Eye Chalk: 18 sticks each of vermilion, yellow, blue, and green, for a total of 72 sticks. [Features] Universal design with color vision compatibility. Easy to see even for people who have difficulty distinguishing colors. [Dimensions] 1.12cm x 6.3cm