SIEFCO Hollow Block A1 With 2 Holes Size 400*200 mm Width 100 mm

A concrete masonry unit (CMU) is one of several precast concrete products that are standard shape size and used in building construction. Most concrete blocks have one or more holes cavities, and their sides may be cast smooth or with a design. They are colloquially known by many names like “concrete block”, “CMU”, or simply “block”.