The Highland Stone® 6” wall system combines concrete stone-look wall blocks featuring rich textures, varied contours and all the advantages of the patented rear-lip locator, making it a reliable and easy-to-install alternative to natural stone walls. The Highland Stone collection includes retaining wall block, freestanding wall block and our 2.0 freestanding wall system with a 5" depth block. Each block system comes in large, medium, and small block sizes and is complemented by a corner/column, and cap block.