Hinged Hood Door Made from durable tinted acrylic and is generously sized to accommodate even the largest rollers Height Adjustable Knob Easily adjusted to the height of the dryer and secured with a knob. It easily adapts to any chair to provide optimal comfort for the customer Swivel Hood Lid can be tilted up or down to meet a wide range of usage requirements Sturdy Base & Swivel Casters The star-shaped base provides excellent support and fixation, and the five smooth rollers are easy to move and improve work efficiency