Stackable concrete wall barrier blocks for large retaining walls, barriers, or for building bins. We are able to provide shipping to destinations within Northwest Illinois. Specifications: – 1 cubic yard of Concrete – Weight: 4,000 lbs. – Lifting cable embedded top surface of block – 4,000 PSI Rated Concrete – A raised “male” V notch runs along the top and down one side of the block while an inner “female” V notch runs along the bottom and up the other side. V-Interlock blocks are the only blocks to continuously interlock on all four sides.