ACDelco 520-116 Advantage Gas Charged Rear Shock Absorber<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Super-finished chromed piston rod inhibits corrosion and provides a more consistent wear surface</li><li>Piston seal adjusts as it wears to maintain a tight seal between the piston and pressure tube. This minimizes leak paths for a longer， more consistent， product life</li><li>O-ring provides constant pressure to the inner tube and makes the valve less susceptible to dirt， wear， and fatigue leading to longer service life</li><li>Drawn over mandrel (DOM) pressure cylinder for a smoother surface and less resistance， resulting in increased service life</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21ZzIDl8JhL.jpg" noproxy>