Choose this cost-effective, comfortable task seating for classrooms, computer labs or offices. This chair offers the same features as the Royal Seating 1100 Chair with the added benefit of easy height adjustment and mobility. The one-piece, extra-large, high-density polypropylene shell is mounted onto a 5-star base with 2" dual wheel casters. Added ergonomic comfort is accomplished with a side lever that adjusts the height pneumatically 17 3/4" to 22 1/4"H. Chair also swivels 360 degrees. For added comfort choose the chair with 1" thick upholstered pads covered in fabric.