A Compression Spring is used in the Slack Adjuster of the service brake to ensure the efficient and effective regulation of braking. Compression Springs are helical springs for compression and tension whereby the Spring gets compressed (shorter) as more weight is applied. They allow for a more efficient energy storage method and provide a smooth change in resistance over time.Attributes:• Manufactured to precise specifications and are built for durability and reliability• Provided with an active number of coils of 3.506Applications:A Compression spring is used in service brakes for effective braking purposes.