<https://queenersuspension.com/products/hyperco-composite-mono-leaf-spring-chevy-options#product>
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"Aerospace epoxy matrix composite is 70% lighter than steel with quickerresponse, higher yield strength and better retention. Springs are molded tothe exact shape to resist relaxing. Initial costs are greater, but compositesprings will last five times longer than steel."
<https://queenersuspension.com/products/hyperco-composite-mono-leaf-spring-chevy-options>