These springs can help improve the feel of the clutch pedal on Fanatec Clubsport v3 pedals, they offer a firmer pedal experience.
 
Yellow:  - Max Compression Rate: 50%; Maximum Load: 314N
Blue: firmer than the yellow - Max Compression Rate: 40%; Maximum Load: 530N
 
The springs come with a pair of plastic end caps that sit on each end of the spring to protect your pedals and ensure the springs are seated correctly.
 
After you have installed the spring it is recommended to recalibrate your pedals in the Fanatec software.