Mugen Seiki Rear Damper Spring 1.6/10.75T (1pr): X8R/8RE/8/8E, X8T/E

Mugen Seiki Rear Damper Spring (X Soft, 86mm, 10.75T) (2)

This is a pair of rear black shock springs. 1.6/10.75T: 1.6mm spring size and 10.75 turns of coil on the spring. More coils equals a softer spring, less coils equals a firmer spring: X8R/8/E, X8T/E