LengthWidthHeightSeat DiameterWeight Capacity24"24"18"-25"/20"-26"/22"-31"24"250 lbsThree pneumatic height adjustment ranges. Contoured 18" x 18" ergonomic seat cushion. Dual adjustable lumbar backrest. Syncronized seat and back tilt. Available Options: left/right ratcheted body support, adjustable foot ring and stationary armrest . Brewer's 3300 Series Dental Stool is the perfect seating for long work days thanks to its ergonomic design. A variety of options across thirteen models gives you the opportunity to choose the stool that is right for you. Comfort is the name of the game with the 3300 series. The dual adjustable lumbar backrest is syncronized with the seat to provide continuous support while working, and the waterfall design of the seat eliminates the risk of pinching. Also, the deap seat pan and contoured 18" x 18" seat cushion features an ergonomic design, which allows for proper weight distribution and helps avoid injury and discomfort. Pneumatic height adjustment of either 18" - 25", 20" - 26" or 22" - 31" makes it easy to find the most comfortable seating position. A 24" powder-coated cast aluminum base equipped with polyurethane tread casters provides stability and smooth, reliable movement. The stool has a weight capacity of 250 lbs. All Brewer products conform to US and Canadian electrical and medical industry codes and regulations, and come with a 5-year warranty. On top of the three different height ranges available, the 3300 Series features several other options. Several models come without the backrest for more versatile seating. An adjustable foot ring can be added to complete the stool's transformation into a full-fledged chair, and ratcheted left or right body support provides an important arm and torso resting area. Two models feature a stationary armrest, and all models come with seamless upholstery for an attractive yet functional seat. Buying Options for Brewer 3300 Series Dental Stool. We offer Brewer's 3300 S