JohnC

This is a silly question, but can someone tell me what these things are for?  There are 3 on the back swim deck.  All 3 of mine are damaged and I would replace them, but the cost is crazy ($24.99 each).  What are they used for?  I just bought this boat and I am trying to fix the little problems.

 

John

Is there really no one that knows what these are for?  Why are they there?

Number 46 is the Bumper.