Supco Universal LP802AB Washer Door Bellow. The folds of the bellow allow the tub to move separately from the door during the spin cycle. The door bellow forms a seal between the wash tub and the door, preventing leaks. This bellow is a replacement for Samsung DC64-00802A and DC64-00802B.
This part is also known as a washing machine door bellow, door boot seal, door diaphragm.