No Maintenance - No External Product Tank Needed - Low Capital and Operating Costs - Less that 5 Watts Power Comsumption - Quiet Operation - Easily Integrated Modules: OS-07: 7SCFH/3.3LPM, 8.5psig, 1.6kg OS-11: 11SCFH/5.2LPM, 8.5psig, 2.4kg OS-17: 17SCFH/8.0LPM, 12psig, 2.8kg OS-21: 21SCFH/10LPM, 12psig, 2.9kg