Engineered Now The Original Headrest for Herman Miller Aeron H5, Onyx. Product Dimensions: 12″D x 7″W x 8H. Back Style: Headrest for your Herman Miller’Aeron’ chair. Special Feature: Head Support. Unit Count: 1.0 Count. Recommended Uses For Product: Design, Gaming, Office. Age Range (Description): Adult. Included Components: Headrest, Hex tool, Replacement Bolt for A-Size Chairs, Spare Caps, Instructions. Surface Recommendation: Hard Floor. Seat Depth: 12 inches. Form Factor: Mesh with Frame. Item Weight: 2.66 pounds. Item model number: Engineered_Now_Headrest. Number of pieces: 1. MaterialFrame Material: Engineered PlasticEngineered Plastic. Seat Material TypeMaximum Weight Recommendation: Engineered Plastic300 Pounds. IMPROVE YOUR POSTURE AND YOUR PRODUCTIVITY WITH SUPERIOR ERGONOMICS – One size fits all: The new HW fits all heights. Engineered Now Headrest – Wide (HW) for the Aeron is ergonomically designed to support professionals in constant motion. The ideal head and neck support will maximize performance while using modern technologies. ERGONOMIC DESIGN – Provides head and neck support to help maintain comfort and alignment during long sitting sessions. Designed for ergonomic performance. Free-Floating System – Tilt and height adjustments move freely. Forward and backward angles can be locked for a custom fit and lasting comfort.