KYB Excel-G Suspension Strut is a nitrogen gas-charged, twin-tube design that includes every quality component. It has an ultra-smooth triple chrome plated chrome piston rod to reduce seal wear. The multi-lip, synthetic oil seal is also engineered to keep fluid in and has a wiper to keep contaminates out of the oil. It uses seamless, extruded steel tubing in the inner cylinders, and includes a Teflon band around the piston for a positive seal. This eliminates the chance of any fluid bypass and allows the valves to do their job and keep you in control.