8oz Mega Chalk Blocks

Spider Chalk manufactures 8oz chalk blocks out of pure, lab-grade magnesium carbonate that won't crumble or break. Say goodbye to the brittle 2oz blocks and never again waste time cleaning up puddles of chalk dust. Lasts 2x longer than the same amount of regular, imported chalk. A single 8oz Super-Mega Block is equal to more than 1lb of regular chalk. These blocks are denser, cleaner, dryer, stick better to your hand and last longer.