TMS Set of 2 Synthetic Leather Modern Adjustable Swivel Barstools Hydraulic Chair Bar Stools (Black) Set of 2 Modern Design Synthetic Leather Bar Stool. Condition: Brand New,Color: Black Stylish Modern design Synthetic leather Seat Swivels 360 degrees Pneumatic adjustable height Chrome base 15 inch Rubber ring bottom to prevent floor from scratching Sold in pairs Base Diameter : 15 1/4inch ,Height Adjustment: 21 1/2 inch to 30 inch. Seat Width: 21 3/4 inch,Seat Depth : 16inch.10 3/4 inch high back support.