Monroe 72367 Front Strut Assembly Safe Tech system combines exclusive precision tapered grooves in the pressure tube with application engineered valving and Fluon banded piston Unique groove tube with precision tapered grooves performs like an additional stage of valving for optimum ride tuning Rod displaced valving is tuned specifically for each application and automatically adjusts to provide consistency and ride comfort To reduce friction and ensure a smooth rod reaction, struts are designed with all weather fluid formulated with special modifiers