Double O-ring Centerseal. Two O-rings for positive sealing and plastic bearings for long life. World Class Diaphragm. High quality rubber compound, resistant to heat and cold. Superior flexibility even at -40F. Orange Alert Stroke Indicator. Self-piloting Dust Shield. Sizes to fit all drum brake applications. Superior Power Spring Technology. Advanced powder coating process. Resists corrosion and fatigue.

Product Features:

• Heat treated power springs for maximum output force and extended life, powder coated for corrosion protection
• Aluminum center body is durable, lightweight and corrosion resistant
• Double O-ring center seal and wears rings extend service life and protect against air leakage between chambers
• Patented orange alert stoke indicator is visible when brakes are out of alignment
• Epoxy coated clamp band and service return spring for additional corrosion resistance