WMCOPFB_5821 Color: Flax Fabric and Black Base Features: -Simple conventional mechanism with centered pivot point for use on chairs with fixed seat-to-back relationship.-Tilt tension knob adjustment.-Seat pivots from center point.-One lever for locking seat angle and activates seat height.-Molded plastic frame with breathable nylon mesh and fixed lumbar support.-Meets or exceeds all application BIFMA requirements.-Made in the USA.-Adjustable arm range: 2.25" Up / down height adjustment. Collection: -Fermata collection. Warranty: -Lifetime warranty.