Serpent Cobra GT shock springs
For the 1/8 Cobra GT and GT-e, Serpent have released this range of shock springs for the front and rear. Top quality hardened spring steel springs, they have been selected, paired and matched, feature precision ground flat ends and are color coded. The range includes 18lbs, 21lbs, 29lbs, 31.5lbs, 34.5lbs & 37lbs versions.
Source: Serpent [serpent.com]