The Traxxas X-Maxx Heavy-Duty Left Lower Suspension Arm features a design which incorporates latest proprietary composite material. Traxxas designed this composite specifically for high loads and hard landings with just the right amount of flex to resist breaking—even in cold weather. Whether you’re sending it at the skate park, or preparing for the next speed run, these arms were built for extreme punishment. Package includes one suspension arm that can be used on the front or rear, on the left side of the chassis.