This is the optional Shock Spring Set for the GPM racing or Hot Racing 100mm shock

Steel construction.
chrome Silver Spring,
Hot Racing cold-coiled springs are designed to support your 2wd oN Road use
Hot Racing springs are chrome plated with a distinctive chip-resistant finish that does not affect performance but dies help make your truck stand out, and help to discern one upgraded spring from another.
These upgrade springs performance best on a fast on road it help to decrease body roll.

Two 62mm front spring
Two 68 Rear Spring

The springs must be installed onto the built shock.

10 turns and 13Turn,
35mm and 45mm long,
1.4mm wire
length: (62mm) (68mm)
Diameter inner: (14mm)
For TD10006, TDR10008 DP1006, 07, TD9006, TDR9008, DP1006, DP9006.
Coil springs can be either "hot-coiled" or "cold-coiled". Cold-coiled springs are more precise, Hot Racing cold coiled springs are wound from pre-heat treated spring wire stock. Many so call performance springs are cold-coiled from annealed "bundle stock" then quenched and tempered after coiling. This method produces a less accurate spring and can result in surface imperfections.