... ES, LS, LX, RX, GX. Ceramic (NAO) | Low-Metallic | Semi-Metallic United Material Brake Pads is a pioneer in the design, development ... brake pads, the most important part is the friction material. Our development laboratories have been designing and testing materials ... brake pads in independent tests. In fact, all United Material brake pads are engineered and improved beyond OE specifications. Automotive ...