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. 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. Product Dimensions: 7.09 inches x 11.81 inches x 11.81 inches. Weight: 3.52 lb. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your satisfaction is guaranteed! All of our items, unless otherwise stated, will only run on 120 volts. Please check to make sure your country complies with these specifications. We will work with you to resolve any problem you may have.