CLASS uses a wide variety of products. Here are links to our suppliers of sod, ground covers, retaining wall stone, paving stones and bricks.       H&E Sod - ground covers, mulches & decorative stones   Town & Country - concrete, stone & timbers   Keystone - retaining walls   American Excelsior - turf starter blankets & erosion control     Paveloc Industries - paving brick & stones       Valley View - lawn edging, brick & paver edgings   Unilock - paving stones, bricks & retaining walls   American Sod - wildflower sod, Kentucky & American shade   bluegrass, buffalo grass & sports turf