Master Massage Ergonomic Swivel Saddle Rolling Hydraulic Comfortable Adjustable Stool in Black

Saddle seat design for more comfort and support to the spine by reducing painful pressure on the back. Features pneumatic-lift mechanism. Seat DiameterL x W: 18 x 16 inches and full 360 rotation. Features 2.5 of our Exclusive Multi-Layer Small Cell Foam. The hypoallergenic CFC-free oil and waterproof upholstery. Adjustable height of 20.5 to 27.5; Weighs 11lbs but supports 550lbs.