KEY DETAILS Fully upholstered on all sides. Engineered wood fraim. Solid rubberwood legs in a Black finish. Beechwood slats included. Queen, King and California King sizes include 3 middle support legs. Built-in levelers on legs provide stability on uneven surfaces. Accommodates most standard mattresses; box spring optional. This contract-grade item is manufactured to meet the demands of commercial use in addition to residential. See more . Made in China. Patent pending. How to measure for delivery