AmeriCan Goods High Quality Professional Doctor Classical Assistant Stool stool helps relieve lower back pressure and maintain healthy posture. Dental stools are equipped with a height adjustment mechanism, allowing dentists to customize the chair's height and rotate 360 degrees the armrest/backrest according to their preferences. - Contoured seat for increased comfort, with a 18.5” width, 17” length - Round backrest has a 16.5” width and 13.5” height - Adjustable seat height and width between backrest and seat - Seat base has a 23” diameter - Seat height can adjust between 18.5” and 24” - Comes with the assistant stool foot ring and armrest