VSI Heavy Duty Racks for Rhizoboxes. Our heavy duty Rhizobox racks allow for the safe, convenient and standardized (angle!) placement of large and/or heavy Rhizoboxes in grow rooms, greenhouses or outdoors. The racks are made of sturdy aluminum bars, PP spacers and a shading panels for the first Rhizobox. Adjustable legs allow for good placement on uneven floors. Racks can hold from 5 to 10 Rhizoboxes, depending on size, and are available angled at 45° or customized. Get a quote by filling out the Rhizobox configuration form. Happy Root Research!