Pure Magnesium Carbonate Chalk In Mesh Bags. Great For Keeping Chalk Dust To A Minimum At The Gym And Crag. Sold As Individuals In Either Standard Version Or Refillable Version. Also Available In A Countertop Bin With 10 Chalk Balls.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }