This is a 120 volt, 60 hertz drain pump that is manufactured to remove water from the tub of your washer once your clothes are washed. This part is the pump and motor assembly, which includes a red flapper to prevent drain backflow.
Part# 137221600 replaces these:
AP5684706, 2754548, 137221600, 131724000, 134051200, 134740500, 137108100, 137151800, 137151800KITK, PS7783938