This Associated factory replacement spring set for the Model 24 includes both soft and hard rate springs, with green springs representing the soft tune and blue springs representing the hard tune. Having both rates in one set lets you dial in suspension feel to match track conditions or driving preference without ordering separately. The set is designed specifically for the Associated Model 24 platform. Features: Includes soft (green) and hard (blue) rate springs Two spring rates for tuning flexibility Direct factory replacement for the Model 24 platform 7/7/26 cs