The storm Category 5 is the next evolution of the storm regulator, the original dedicated airsoft regulator. The Category 5 is optimized for reliably fast, adaptable and consistent performance over the entire pressure range required by HPA products. Recommended for HPA Airsoft Guns requiring pressure between 60-180 PSI. The Storm 5 comes with a much larger bore air hose compared to the standard storm regulators, which is a must have for those who want high air output. Get the most out of your Wolverine Airsoft HPA system.