This Hop-Up option component is usually to be properly used because of TC-01 framework. The part replaces the stock synthetic spend aluminum elements because of this increasing a high-spec suspension system system system system setup. • Aluminum Damper Extenders x4 • they have been precision, lightweight aluminum variants the kit-standard synthetic component. They further enhance damper performance. • Tamiya blue anodized finish. • ideal for TC-01 framework vehicles.