From private offices to open-concept work spaces, L1’s design fits seamlessly into an array of settings. Living up to its namesake by providing all-day support, L1 remains affordable proving style, comfort and health never need to be sacrificed in the name of cost. Birch frame and base features black mechanism and black carpet casters. Optional adjustable headrest [fabric matches seat] Optional adjustable lumbar. Headrest and Lumbar cannot be field installed. Overall [Synchro Tilt]: 38.5" - 43" H | 27.5" W | 27.5" D Seat [Synchro Tilt]: 15.5" - 20" H | 20" W | 20" D Back: 22" H | 19.5" W