AGGRESSIVE STREET: ET500 - This compound is offered for the adventurous drivers who: - Do not like loud squeaking - Do not like a lot of dust - Do like extended rotor life Being these pads are streetable therefore they are not intended for intensive and continuous hard braking over the temperature and speed limit (see chart) on the race track, otherwise excessive wear may occur. ET500 Series Characteristics: Excellent Modulation Consistent friction and torque output Run from ambient temperature (even in cold winter morning) Extended life if they are used under the temperature guide Affordable pricing