Item Weight 1.6 Kilograms. 11.81 x 7.09 x 11.81 inches. Frame Material Engineered Plastic. Maximum Weight Recommendation 300 Pounds. Specific instructions for use. Office, Neck Support, Ergonomic. Recommended Uses For Product. Headrest, Hex tool, Replacement Bolt for A-Size Chairs, Spare Caps, Instructions. EXPERIENCE THE ULTIMATE UPGRADE TO YOUR HERMAN MILLER AERON – The H3 ENjoy is designed to provide you with the neck support the Aeron Chairs are missing. The H3 is the standard size model, comfortably fitting all users under 5’11. LEAD COLOR – Perfectly matches your Classic Aeron Chair in comfort, quality, and color, with complementary Lead Mesh. [MATCHES CLASSIC AERON CHAIR MODELS YEAR 2016 OR OLDER]. IMPROVE POSTURE AND PRODUCTIVITY – Our headrests are ergonomically designed to support the head and neck, helping you stay comfortable, aligned and focused throughout the day. ADJUST TO YOUR COMFORT- EN headrest are intended to be free flowing. The tilt and the vertical adjustments are free-moving, while the forward and backwards adjustments can be locked to your best comfort. HOW TALL ARE YOU? Our headrests are offered in two sizes to accommodate a wide variety of users. If you are under 5′-11 (180 cm), choose the H3 model. If you are 5′-11 or taller, choose the H4 model. WHICH AERON DO YOU HAVE? Our headrests are designed to fit both Classic and Remastered Aeron chairs. Note the appearance of the Tilt/Lift Mechanism to determine which one you have. WHAT COLOR IS YOUR AERON? Locate the white sticker underneath your chair. The color code is the last 4-5 digits on the first row. It’s time to get the most out of your Aeron. Engineered Now is proud to offer the fine-tuned H3 and H4 Headrest to enhance your Herman Miller Aeron, elevate your comfort and improve your productivity. From large corporations to home offices, these ergonomic add-ons are a must for every avid Aeron chair owner. Eliminate upper-back, shoulder, and neck pain by adding this headrest to your chair today! Superior Ergonomics Offer You All Day Support, Comfort and Focus. The new and improved H3 and H4 Engineered Now Headrest provides reliable support that adjusts freely Up & Down, Forward & Backward, Tilt Up & Tilt Down, and all from a seated position! The headrest “Locks” into position for personalized support, but can still be adjusted easily by hand from sitting. With ergonomics in the forefront of our design, the headrest adjustments are intended to be free flowing and to flex with your bodies position in order to preserve an ideal body posture. Experience The Difference – Upgrade Your Task Chair Now. Experience instant relief as you lean back for the first time with the latest Engineered Now Headrest. Expertly designed to not only perfectly match the fabric and design, but also to enhance the ergonomic support of the Herman Miller Aeron Chair. Our headrests allow you to relax and maximize your productivity. Experience better focus by promoting your body’s natural alignment as our headrest move with your body movements, offering full support through the day. Easy Installation and Adjustments. We offer the best prices around on high quality products. Our E-store includes media such as books, movies, music and games while offering electronics, toys, sporting apparel, clothing, tools, general home, garden items and more. We are always working hard to ensure your package arrives as soon as possible. We do not accept P. Please provide a physical address. We try our very best to make sure every customer is completely satisfied. If there’s a problem, message us! We’re happy to help.