These are the 4.4 Black Rate Shock Springs for the Traxxas Revo, TRAC71**.

FEATURES:
Steel construction
Painted red w/small black stripe
4.4 tension rate (slightly lighter than stock rear spring)

INCLUDES:
Two 4.4 Black Rate Shock Springs for the Traxxas Revo

REQUIRES:
Assembly to vehicle

SPECS:
Static Length:  50mm (1.77")
Wire Diameter: 2.4mm  (.09")