OT1052 Features: * Contour seat and back with built-in lumbar * Pneumatic Seat height adjustment * Locking tilt control with adjustable tilt tension * 360 Degree swivel * ""C"" Arms * Heavy duty nylon base with dual wheel casters * Arms max inside: 20.75"" * Arms to floor min: 26"" * Seat travel: 4.25"" Assembly Instructions: * Minimal assembly required Dimensions: * Seat dimensions: 20"" W x 18"" D x 2.5"" T * Back dimensions: 20"" W x 20"" D x 3"" T * Seat height: 18"" - 22.25"" * Overall dimensions: 39.25"" H x 24"" W x 27"" D