Set of 4 spring cups & perch for use Traxxas TRX-4 GTS shocks and Losi mini T springs. Spring cups are designed for less preload on springs. These are 3D printed parts designed to properly fit the smaller springs with the stock shocks. Condition is "New". Does not include the shock and spring shown. Last picture is for application example only. Message me if you are interested in other colors. Shipped with USPS First Class.