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Product Quantity: 5 Pcs
Product Material: calcium carbonate, calcium sulfate
Chalk Size: 3.1 inch X 0.4 inch (8cmX1cm)
Nice Non-Toxic Chalk Extender for Office and School
Plasstic Chalk Extender and Chalk 5 Pcs for School Stationery & Office Supply - B07DGYCPK6