Mueller Falling Film Chiller. 300 PSI designed pressure and test at 350 PSI. R404A refrigeration medium. Includes (2) 4" x 8' dimpled chiller plates with expansion for a total of 16. Includes Mueller compressor, Mdl. ACU1A015M5N 052PMF3, SN 021902, 2 fan with 1/2 hp motors, 575V/3PH/60Hz. Both units are stainless steel construction.