Retro Acrylic Hydraulic Lift Adjustable Height Swivel Office Desk Chair Clear (3801-5) Made By jersey seating Made of High Quality Acrylic Swivel Seat with Hydraulic Lift and rolling wheels Seat Height : , Seat Depth: 20", Seat Width :18.5" Weight Limit 200 Pounds 6' Tall UPDATED VERSION: customers have told us in the past that the regular wheels do not work well on hard (wood) floors and so we upgraded the wheels to higher quality rubber/plastic so that they will work smoothly on hard (wood) and soft (carpet) floors.