Desk converts easily, securely, and without tools from a sitting height to a standing height. The desk surface height is adjustable from 22” to 29” in 1-1/4” increments. Constructed in beautiful, durable birch plywood in safe, non-toxic natural UV finish that won’t yellow and withstands rigorous use by children. Greenguard Gold certified. Ships fully assembled. Lifetime warranty. Made in the U.S.A.