' , 7 Fox 2.0 Factory Series 18in. Air Shock 1 1 4in. Shaft (Normal Valving) 40 90 Black Zinc. Uncompromised performance through FOXs patented internal bypass technology delivers the feel of near endless suspension travel. Exclusive internal bypass technology allows oil to flow around the piston at some points of the stroke while creating humongous pressure at other points supporting the vehicle like no other product can. Floating through terrain is accomplished with FOXs ride zone combining a race developed shock piston, internal bypass and Dual Speed Compression adjustment allowing fine tuning for weight, terrain and speed. Dominate any terrain with the brute strength of 3 and 2. 5 inch aluminum bodies, cactus cooler reservoirs and 7 8 shafts with redundant seals, all proven in the harshest of environments under the toughest of conditions.