Whether you're tackling tough terrain or smooth city streets, Rough Country's Nitrogen-charged M1 Monotube Shock Absorber leads the way, delivering impeccable ride quality and performance mile after mile.Features and Benefits2 in. Seamless Extruded Tube46mm Digressive PistonSelf-Adjusting Deflective-Disc Independent Rebound And Compression18mm Centerless-Ground/Case-Hardened/Chromed And Super-Polished Rod46mm Monotube Design Ensures Consistent And Fade-Free Performance In All ConditionsDigressive Valving Instantly Reacts To Changing Surface ConditionsZinc Plated For Resistance Against Harsh ElementsAvailable In Various Lift Heights For Multiple ApplicationsDurable Vulcanized Natural Rubber BushingsFree Shipping3 Year Manufacturer WarrantyApplication Summary1987-1996 Ford F-250 XL Custom XLT Lariat XLT Special Eddie Bauer (Rear) (Drive: 4WD / Note: Monotube; 1.5-4 in. Lift; 26.1 in. Extended Length; 16.34 in. Collapsed Length; w/1.5 - 4 in. Lift1987-1996 Ford F-350 XL Custom XLT Lariat XLT Special (Rear) (Drive: 4WD / Note: Monotube; 1.5-4 in. Lift; 26.1 in. Extended Length; 16.34 in. Collapsed Length; w/1.5 - 4 in. Lift)