This is a swivel ( 360 degrees ) computer/desk chair with 5 rolling casters that lock in place when you are seated and release when you stand up for ease of movement. It has a built-in lumbar support; a seat tension adjustment and a seat height adjustment. The mesh material in the backrest allows air through it to your back during long sitting periods. The seat width is 18" and the depth is 19" and the colors are blue and black. It is in very good condition and cash at time of pick up.