Ideal for the classroom this pack of 100 chalk sticks ensures clean and tidy writing and drawing on blackboards this chalk uses a dustless formula that reduces mess and helps prevent stains on clothing and its easy to clean because its dustless its ideal for hypoallergenic use with those sensitive to chalk dust allergies this pack contains 10 each of 10 different colours including blue peach yellow orange purple green red and more coloured chalk for blackboards dustless no mess