These units are absolutely the best of both worlds. This special made unit has an integrated 400 CFM ACS (after cooler system). The AmphiBlast system is the industry's most efficient and productive dual-purpose abrasive blaster. Unlike other blast systems that mix abrasive and water inside the vessel, the AmphiBlast system injects water into the blast stream after the metering valve, using a patent-pending, user-friendly and uniquely precise water injection system. With this system, you can quickly and consistently control every aspect: fine-tune air, abrasive and water flows to achieve optimal blasting performance, all while maintaining efficient use of grit and water. Switch between wet or dry blast, blowoff, and softwash™ without having to reset your air, abrasive or water, using a central, easy-to-use gauge console. These units are PRESSURE HOLD and have the Schmidt Tera Valve. I have 3 units left.