Lifetime 60053 Raised Garde Bed Kit, 2 Beds and 1 Early Start Vinyl Enclosure These 4 ft by 4 ft garden beds are constructed of high density polyethylene; will not rot, chip, crack, or peel Easy do it yourself assembly requires no tools; full garden set up takes less than one hour Designed to absorb and retain the needed soil warmth for root development Walls are 9 inches high and two can be stacked to create 18 inch high box; can also be used as a child's sandbox Stylish simulated wood design; backed by a 5-year manufacturer's warranty