Vendor Information: Allan Block is a leading provider of concrete blocks for landscape walls retaining walls and free-standing courtyard walls. Using patented designs the interlocking blocks provide unlimited design flexibility and are available in a wide variety of colors textures and sizes. All blocks install quickly and easily without mortar. The maintenance-free blocks create lasting beauty and value. Allan Block is available at hundreds of locations across North America. For a complete library of Allan Block product information landscape design ideas and installation guides visit www.allanblock.com.