Thinking about using a Lever changer or just wanting to use CO2 in your PRP? Since the PRP was optimized to use 400-700 psi HPA it will not provide repeatable performance without installing a properly sized Power Tube for the higher pressure gas. The ICD PRP CO2 Power Tube comes with an adapter for the PRP Nelson based valve, a valve cup, valve seal, and the power tube itself and is fully pre-set and ready to install.