Samix TRX-4 brass spring retainers
Coming from Samix and made for the Traxxas TRX-4 trail truck are brass spring retainers. They are machined from high-quality material, come with a black surface coating for wear and looks and their closed design ensures they will not fall off even when the going gets tough. The spring cups weigh in at 25g and thus they add weight to one of the lowest parts of the chassis for improved climb performance. The set includes four direct-fit spring retainers.
Source: Samix [rcsamix.com]