I'm slowly adding to my shopping list and need to add the black stuff in the picture below. It's tucked into the edges of the side windows. So I don't look like a twit when I go to the RV store, what am I asking for?
That's called Trim Strip Insert. Screw strip insert, or similar names. It's available in two different widths, be sure to get the right one. It's also available in colors. Look on eBay for best prices and choice of color.