The Greenhouse Gravity Flow Rack centralizes order picking for faster, more organized shipping. Flats are loaded on the rear of the rack and moved toward the front picking zone on inclined shelves equipped with a Kenrail roller track. Racks have one or two picking levels that are up to 20 feet deep. Flats flow on a galvanized steel track with polyethylene wheels on 11/2-inch centers. Many sizes are available, and racks can be made to your specifications.