Manufactured of high-strength concrete, the Courtyard collection includes five lightweight, dry-stacked, interlocking landscaping blocks that can be used to construct retaining walls, garden walls, circular or serpentine curves, and posts. The patented system incorporates a top lip and bottom notch to form an automatic setback of 3, 6, or 12 degrees of lean. Allan Block. 800.899.5309. www.allanblock.com.Circle 14
