Compatible models: Super Cab 50 (12V vehicles only), C50, AA01, Cab and FI cars), Super Cab 70 (12V vehicles only), Super Cab 90 (12V vehicles only), Little Cub (C50, AA01, Cab and FI cars), Press Cub (C50, AA01, Cab and FI cars) * 2 Spring Rate Normal Approx. 10% UP Ratio. *Total length 8.3 inches (210 mm). *Eliminates the fluffiness of normal shocks, and provides a stable ride.*Not for 6V cars.*Not for Super Cab 50 AA04, AA09, AA07 models.The only spring color is the difference between the blue spring model.