Monroe SC2951 Magnum Steering Damper Full Displaced Valving: Better valving range on both the compression and extension cycles of the unit for a smooth comfortable ride All Weather Fluid: Contains special modifiers to reduce friction and ensure smooth rod reaction Sintered Iron Piston: Stronger than traditional metals, enhances durability for long service life 1/2" Piston Rod: Heavy-duty nitrocarburized rod for long service life Micro-Cellular Gas Design: Allows unit to be mounted horizontally