This replacement louver panel fits the Aerocool brand of evaporative coolers but may also fit the old Adobeair Mastercool brand. The panel size is 38-3/4" wide x 23" tall. Please double check measurements before ordering.
This louver is made by Phoenix Manufacturing and is a different shade of tan than the Adobeair Mastercool. This will cause your Mastercool unit to become two-tone, which most people don't seem to mind.