Seller notes

Progressive 444 Series Heavy Duty Shocks Features the all new Frequency Sensing Technology (FST) which allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality Deflective disc valving Adjust spring pre-load by hand, no special tool needed Includes a progressive rate spring and is high-pressure gas charged for consistent performance Standard or heavy-duty spring rate with a black or chrome finish Made in the U.S.A. Chrome 444-4019C 12.5"...

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