For hardworking half-ton trucks, the complete Monroe Magnum Loaded Strut Assembly includes an application-specific design and variable rate coil spring that delivers a comfortable ride and maintains ride height for everyday driving or when under load. Product Features:DESIGNED FOR TRUCKS -- Specifically designed for hardworking half-ton trucks that tow, haul, and plowHELPS CARRY THE LOAD -- Variable rate coil spring delivers a comfortable ride and maintains ride height for everyday driving conditions or supporting the loadMAINTAINS VEHICLE CONTROL -- Acceleration Sensitive Damping (ASD) improves vehicle control over abrupt bumps, dips and potholesBUILT TO LAST -- Bearing with PTFE coating protects the rod guide to reduce damage to the seal and chrome piston rod provides durability and long service lifeIMPROVES PERFORMANCE -- Nitrogen gas-charge helps maintain tire to road contact for improved ride and handling by reducing aeration and shock fadeREDUCES FRICTION -- Fluon-banded piston helps reduce friction between the piston and pressure tube to respond more quickly to changing road surfacesRESPONDS TO CHANGING CONDITIONS -- OE all-weather fluid contains special additives to assist with extreme temperatures and help reduce oil breakdownDUST BOOT/JOUNCE BUMPER -- Protective dust boot reduces dirt and moisture, while jounce bumper reduces severe suspension movement