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| PartNumber | HW4B-A2F10-Y | HW4B-A2F20-B | HW4B-A220-R |
| Description | Pushbutton, HW Series, Metal Bezel, Extended, Non-Illum, 1NO, Maint, Yellow | Pushbutton, HW Series, Metal Bezel, Extended, Non-Illum, 2NO, Maint, Black | Pushbutton, HW Series, Metal Bezel, Extended, Spring Term, 2NO, Maint, Red |