The MacBook is carved out of solid aluminum, thus giving it a distinctive look and a grayish-white hue. The MacBook Air in particular has a thin and light design. There are two versions of the MacBook Air: the 11-inch, with an 11.6-inch screen; and the 13-inch, with a 13.3-inch screen. Apple splits the MacBook Pro into a 13-inch and a 15-inch, with the latter consisting of a 15.4-inch screen. Each computer has a full-size, backlit 78-key keyboard.