Concrete Block - Standard CMU for Construction & Masonry Projects #3850743 (License: Personal Use)

This is a standard concrete masonry unit (CMU), commonly known as a cinder block or concrete block, featuring three elongated oval voids to reduce weight while maintaining strength. The textured gray surface mimics real concrete aggregate, and its precise geometry supports mortar bonding and alignment in wall systems. Used widely in residential and commercial construction, it allows for embedded rebar and insulation.

This image is used on construction supply websites, architectural resource pages, and DIY building guides to illustrate standard CMU specifications. It serves users searching for building materials, masonry tutorials, or product catalogs-matching intent for procurement, design planning, or educational reference.