High Back Extra Comfort Task Chair with extra foam.\r\nSliding seat and Inflatable back lumber support.\r\nBlack polypropylene height adjustable arms.\r\n3 Lever Synchronous Mechanism.\r\nBack lever releases back to free float and lock in desired position.\r\nMiddle lever releases seat to free float and lock in desired position.\r\nForward lever adjusts gas height spindle.\r\nTension knob adjusts tilting intensity.\r\nManual hand wheel adjusts back height.