Replacement Arm Pad Pair For Herman Miller Aeron Office Chair. Attention These Pads Are Only Designed For The Classic Aeron Model. This is brand new pair of replacement arm pads made from EVA molded Polyurethane foam. New design is much softer to the touch and will hold up many more years than the original rubber pad design. If you have any questions I respond quickly. You will receive: 10 Pair of Black Arm Pads (Screws Not Provided).