The Lifetime 26 x 18 inch Adjustable Height Personal Table is constructed of high-density UV-protected polyethylene and powder-coated steel for durability and indoor/outdoor use. Three adjustable height settings (24, 26, and 28 inches) allow you to use this Lifetime personal table for a variety of purposes. Just squeeze a plastic trigger underneath the tabletop to telescope the legs to the desired height and then release the trigger so the legs will snap into the adjustable height hole indentations in the steel frame of the tabletop. Water proof and stain resistant tabletop is easy to clean and requires very low maintenance. Smooth surface allows for smooth handwriting as well. You'll appreciate the portable design that allows you to fold it flat for easy transportation and storage.