Window weather stripping.

The part you are showing looks like some sort of glazing bead. Could we have you confirm that this in fact a glazing bead? if so, please get back to us with detailed measurements and dimensions. 

Thank you for the clarification. I am not sure which of our glazing beads would make a good match; either our 55-195 or the 55-211. Look over both pieces carefully and see if either one of these would work for you.