This is a pair of Red 4.4 Rate Black GTR shock springs from Traxxas. 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.
Features: Steel construction Painted BLACK. 4.4 tension rate (slightly lighter than stock rear spring)
Static Length: 50mm (1.77")
Wire Diameter: 2.4mm (.09")