Brandt Industries Armless Vinyl Medical Stool with Backrest (15512 Black)

Hydraulically adjustable by means of a convenient foot pedal. Raises, lowers or locks the chair anywhere within its 360 degree range of rotation without the use of ones hands. Height adjusts from 22.5" to 29.5". Backrest that adjusts vertically and will tilt to conform to users body is 14.5"W x 9.5"H.