Comfort and durability meet to create this traditional Dental office stool. PRODUCT BENEFITS: Comfortable 4″ Thick, 15″ Diameter seat cushion. Many Options Allow Ability to Customize. Contour Backrest (Optional). Various Height Options. Swing Arm or Ratched Body Support. With backrest. Curved 16" seat. Dual adjustable lumbar backrest with aseptic shroud.