need white vinyl snap in glazing bead for sliding patio door
A handy person from Parker CO says:
May 11, 2015
Pictures attached. I can't find any markings on the door as to brand. Looks close to your 55-178 but not exact.
Paul from SWISCO responded:
May 13, 2015
Our 58-178 is used in many vinyl windows and appears similar to your sample. See if this can work for you.