The Riverstone Monticello 8 ft. x 8 ft. Work Bench System is specifically designed for the Monticello line of 8-foot greenhouses and can be installed at initial construction or at a later time. This greenhouse work bench kit includes a full, 8-foot run (24 in. deep) for use on either side of the Monticello greenhouse. Since the installation of the support bars uses the inside bolt tracks, the shelving could be set at any height within your greenhouse up to 4 ft. off the ground. Constructed from high-impact PVC, the vented shelving system is made to last and allows air and sunlight to reach underneath the work bench.10 year limited warranty