This Heavy Duty Servo Saver Spring Set provides ideal parts for your ARRMA vehicleFeatures:Constructed from strong and durable spring steel for long-lasting performance - Precision manufactured for consistent operation in extreme conditions - Includes servo saver, inner and outer springs - Springs are 13% stiffer than #ARA340168Includes:1 x Servo Saver Inner Spring 1 x Servo Saver Outer Spring 1 x Steel Washer 17 x 27 x 1mm