DescriptionThere are some dust-free chalks, which is made of premium material for durable use. Perfect for school, office and other places. Practical in indoor and outdoor art paint craft. Premium material, safe for people use. Our professional dustless chalk must meet you needs. It is one of the best choices for you.Features-Color: Colorful.-Material: Gypsum.-Size: About7.40X1.10X1.10cm/2.91X0.43X0.43inch.- This chalk will allow your children to play indoors and outdoors, giving them various painting opportunities.- Suitable for teachers, schools, homes, blackboards, parties, etc.- Different colors bring different fun when painting, allowing your children to create freely and draw new ideas- Moderate density, less dust, reducing dust pollution in the classroom.- Hexagonal shape, clear water chestnut, smooth writing, easy to erase.Packing list3 x boxes of chalks