Solid Concrete Block, 4" H X 8" W X 12" L

Concrete blocks, also called cinder blocks and cement blocks, come in a wide variety of shapes and sizes. They are made out of a mixture of Portland cement, sand, gravel and water. When the mixture is wet it is paste-like and can be cast into the form of the block. When it dries, it hardens until it becomes like stone.

• 4" high x 8" wide x 12" long solid block
• Sold individually
• 144 blocks per cube
• Meets ASTM C-90 Standards