Tapered shower door sweep.
A quick learner from Texas says:
August 2, 2016
3/8 x7/8 tapered shower door sweep rare do I find them in bulk
Tom from SWISCO responded:
August 3, 2016
I'm honestly not sure, I don't know what you have. Could you show us a picture of the sweep from the profile? That would help us determine what you have and whether we can replace it. In the meantime, you can browse through our selection of shower door hardware here.