TRX7147 - Two TAN rate GTR shock springs for use on the Traxxas 1/16 E-Revo VXL 4WD RTR. Steel construction, red color, 2.06 rate. Length: 22mm (0.78") - Outer Diameter: 13.75mm (0.54") - Inner Diameter: 10.95mm (0.43") - Wire Diameter: 1.3mm (0.06").