New Black Modern Office Executive Chair Computer Desk Task Hydraulic. Seat Size: 20"(W) x 19"(D) Seat height: 19 - 23" Adjustable Height. Back size: 19"(W) x 23"(H). 360 degree swivel for the chair. Comfortable arm rests. Comfortable, soft PU leather upholstery with ample padding, oil and water resistence. Heavy Duty Base. Pneumatic Gas Lift for Instant Height Adjustment. Buy this Chair and you can Get Free Shipping on a Modern Office Chair (Black) for $54.99 at Rakuten.com, a $64.99 Savings!