Norberts Gymnastics Chalk - 1 Box Ideal as gymnastics chalk, weight lifting chalk or climbing chalk. Helps to improve your grip by absorbing the moisture from your skin. Our top-quality, pemium grade, Taiwanese magnesium carbonate white chalk is preferred by gymnasts, weight-lifters and climbers. Comes in soft cubes that are easily crushed to make powder. Each one-pound box of chalk contains eight 2 oz. cubes and weighs one pound. Made of magnesium carbonate white chalk.