Headrest for Herman Miller Aeron Chair Black Headrest Only. This headrest is designed to fit Herman Miller Aeron chairs in both classic and remastered versions. It features a black frame with graphite mesh that matches Carbon and Graphite Aeron chairs. The headrest offers height adjustment within a 40mm range and tilt adjustment up to 80 degrees for personalized comfort. Forward and backward tilt positions can be locked for preferred support. The product is not recommended for individuals taller than 6 feet 4 inches.