This is a pair of Traxxas Standard Rear 1.4 Rate (Pink) GTR Shock Springs in White for the Jato and XO-1. Traxxas offers a wide variety of spring rates for the GTR shocks to precisely compensate for lighter or heavier truck configurations. The springs use high-quality spring steel with durable powder-coated finishes. Spring rate is indicated by colored dots on the end of the spring.