Product review (5 stars): you can use a cheap piece of copper electrical wire instead for free
This solved my defrost problem. Replaced the stock Samsung part that was too short, which allowed water to build up and freeze -- clogging the drain line, which resulted in water filling up in the crisper drawers.  After doing some research, this is a common problem with most newer samsung refrigerators (mine was a freezer on the bottom style).

I also realized while doing the repair, that I could have gotten the same effect by just using a spare piece of copper wire instead.