The Preval Power Unit Is A Replacement Power Unit For The Preval Spray Gun A Professional Spray System That Is Interchangeable For Flexible Use In A Variety Of Applications. This Power Unit Is Able To Atomize Almost Any Liquid And Offers A Professional Finish. The Power Unit Functions At A Maximum Operating Pressure Of 70 Psi With No Wires Or Hoses Needed To Offer Exceptional Portability.