<p>New Arieltek Mercury Switch Box, it meets or exceeds all manufacturer's specifications.</p> <p>Replaces Mercury Part Numbers 339-7452 A15 and 339-7452 A19. Also replaces Sierra part number 18-5777.</p> <p>NOTE: Please verify the part number you need matches the entire number including the "A" suffix number at the end of the part number. Matching the correct part number including the "A" suffix number is critical for proper fitment.</p>