Designed for durability, safety and years of classroom use. Constructed of 1" tubular steel with a tough, baked-on enamel finish that will resist chipping and corrosion. Safety features include UL-approved light fixtures, shatterproof plastic trays, and rounded edges on all exposed corners. Some assembly is required. Features include:• Adjustable light fixtures which combine fluorescent and incandescent bulbs with dual switches, so that either or both types of light may be used.• Large capacity 18"× 47" plastic growing trays are unbreakable and allow for extremely efficient use of available growing space.• Tough, 3" locking casters roll smoothly and easily-enabling multi-classroom use of the PlantMobiles.• The PlantMobile Teacher's Guide with illustrated, step-by-step instructions for 40 demonstrations and projects.Jewel 56" PlantMobileIncludes three shelves, three 18" x 47" plastic trays, two light hoods with all bulbs, teacher's manual, and an assortment of plastic pots. 1692 sq. ft. of lighted tray area. Dimensions are 52"W x 56"H x 19"D.Note: FB0494 (which includes three light hoods) is pictured.Motor truck shipment is required for orders of multiple units.