50sm16-1-320s is a product code for a Whirlpool refrigerator damper control assembly. It is a white replacement part for Whirlpool refrigerators.
If you are looking for this part, you can find it on various websites, including AMRE Supply and Amazon.com.
Note: It is always best to consult your refrigerator’s owner’s manual to make sure that you are ordering the correct replacement part.