Machined aluminum upper shock cap for T4 SLP aluminum shock absorbers. Ebony color. Pair of 2. top of the aluminum cap features a small vent opening which makes surprise construction extremely predictable and simple, since extra shock oil will escape through this vent gap making sure only the appropriate level of the oil is within the shock assembly. Machined interior ridges confirm proper positioning and sealing associated with super-soft silicone membrane layer.