The LubeSite 260 S-2 unit features a clear, polycarbonate reservoir and base. This design allows for a visual inspection of the unit's internal workings. The 200 Series units should be specified for applications with minimal vibration, impact, shock, high-torque, or centrifugal forces. The 260 S-2 unit is assembled with an extra heavy (orange) spring that is available for applications requiring the use of an extension or higher pressure flushing application.