Concrete Block (CMU) - Standard Hollow Core Construction Block #3741811 (License: Personal Use)

This is a standard concrete masonry unit (CMU), commonly used in commercial and residential construction. It features three evenly spaced oval-shaped voids to reduce material usage and weight while maintaining compressive strength. The textured gray surface mimics real concrete aggregate, and the isometric rendering highlights its dimensional proportions and core configuration.

Used on construction supply websites, architectural specification pages, civil engineering educational content, and building code reference materials. Matches user intent for identifying CMU types, comparing block designs, or sourcing building materials.