Back Style: Solid Back. Special Feature: Ergonomic, Swivel, Rolling, Head Support. Unit Count: 1.0 Count. Recommended Uses For Product: Office. Back Style:? Solid Back. Special Feature:? Ergonomic, Swivel, Rolling, Head Support. Unit Count:? 1.0 Count. Recommended Uses For Product:? Office. Age Range (Description):? Adult. Included Components:? User Manual, Caster. Surface Recommendation:? Hard Floor. Furniture base movement:? Glide. Date First Available: November 2, 2020. Upgrade your Herman Miller Aeron with the Ultimate Bundle! With EngineeredNow’s ergonomic Headrests and top-quality rollerblade casters, you’ll be on your way to better productivity. Upgrade your Herman Miller Aeron with the Missing Piece! Engineered Now is proud to have expertly designed the H3 and H4 Headrests to match the Aeron chairs in quality, comfort, ergonomics, color, and material. Our headrests are ergonomically designed to offer you the support you need to straighten up and be able to remain comfortable, aligned, and focused throughout the day – minimizing back and neck pain while increasing productivity. The different adjustment options allow you to customize your experience. With ergonomics in the forefront of our design, the headrest adjustments are intended to be free-flowing and to flex with your body’s position in order to preserve an ideal body posture. The adjustments which are free-moving are the tilt and the vertical movement while the forward and backward adjustments can be locked to your best comfort. Engineered Now Casters offer you uninterrupted focus as you glide with ease in your office task chair. Expertly designed, our casters swivel effortlessly and without making a peep so you can maintain focus through the workday. These 3 Inch Casters are made to fit most Herman Miller Office Chairs with the universal standard size stem- 7/16″ Diameter and 7/8″ Length. Safe for ALL floor types, including the most precious hardwoods! Installation: Instructions and all parts included. Super-Easy 1 minute installation. Hex-Key Tool is included. Visit the Engineered Now Amazon Store for videos on how to install and adjust your new headrest and casters.