This is Kyosho FS Medium / Medium Hard Rear Shock Spring Set For Ultima Optima. 2 types of new hardness springs in between existing medium and hard. Matches the hardness for characteristics of 2WD buggy, but can also be used for Optima and Turbo Optima. Includes 2pcs by 2 types.
For: Kyosho Ultima / Optima
Kyosho FS Medium Rear Shock Spring (2 pcs)
Kyosho FS Medium Hard Rear Shock Spring (2 pcs)