These 4 in. x 8 in. x 16 in. Concrete Blocks are a great choice for the construction of your next masonry project. Concrete Block construction provides durability,fire resistance and thermal mass which adds to energy efficiency. Concrete block also provide high resistance to sound penetration. These 4" wide units make a great choice for interior partition walls or as an exterior veneer. They can be painted or stuccoed to suit your tastes.