Doctor’s Comort 6176 is a dental chair with air-circulating weave construction, 5-leg base, twin-wheel hard floor casters and Pneumatic-cylinder height adjustment of 17 1/4”–23 3/4”. It has a triple-lever adjustment - independent back and seat, backrest w/angle & height adjustment and Active tilt seat (actively moves with user) with Tilt seat lever function,contoured seat and accommodates maximum of 300 lbs.