• Swivel tilt mechanism
• Perforated back for added comfort
• Height adjustable arm pad (9650 & 9640)
• Tilt mechanism with 4 position lock
• High density/high resiliency foam for comfort and durability
• Compound curved back shell for improved back posture
• Pneumatic seat height adjustment
• Tension Control
• Waterfall seat design
• Model 9620 & 9630 have fixed height arms with nylon arm pad
• 5 prong heavy duty nylon base
• 2" dual wheel carpet casters
• California fire code #117
• ANSI/BIFMA