Ensure your semi truck is Ready for the Road Ahead with improved suspension, with the Hendrickson 48" & 54" Box Cast Iron Ends Quik-Draw Front Linear Actuator. By using cast iron ends that are highly resistant to wear and tear, this replacement device is able to help provide smooth operation in the suspension system. Engineered with ultra-durable components to deliver a long service life. FleetPride is your First Click in Heavy Duty .