Monroe Reflex Monotube Shock Absorber 911509 Monroe Reflex monotube shocks are specifically engineered to provide better handling control and performance for light trucks and SUVs These shocks feature a highpressure gas charge that separates the unit internal oil and nitrogen to provide additional spring rate helping to maximize damping efficiency and control To further enhance ride control characteristics Monroe Reflex monotube shocks include a hydraulic lockout to cushion the impact as the vehicle suspension is fully extended