Quick view Wishlist Item #: CH8X2 CoreFX CFX Gym Chalk 8 X 2 Oz Blocks (Box of 8) CAD $40.70 Gymnastic Chalk Blocks. Box of 8 of 2 oz. blocks. Chalk is ideal for improving grip on pull up bars, gymnastics rings, barbells and dumbbells, and other equipment. Sold as box of 8 blocks. Compare Add to Cart Add to Wishlist