Adeco Hydraulic Adjustable Height Barstool Stool Chairs (Set of 2), Black Materials: PU, foam, Chromed metal parts Total dimensions: 15 7"w*17 3"d*39-47 6"H; Height of Seat:25"-32 9"; Seat size:15 7"w*14 2"D; Back Height:14 2" 360 degree rotation Adjustable Height assembly required Adjustable Height assembly required