What part is this?

[dlsgal]

I am missing half of this rubber washer (first pic is of freezer door which shows the part I need; the second pic is of the fridge door which needs a new washer, half is missing) on the refrigerator door. The fridge door will not stay shut and is not level with the freezer as a result. Can someone please tell me the correct part to order for this washer for my refrigerator? Thank you.