Order a Drotto replacement plastic here. All of our replacement plastics are made of a UHMW plastic. They are incredibly durable and weather resistant. Simply unscrew your existing screws, remove the plastic and replace it with the new plastic. There are 3 sizes offered for the replacement plastic. You MUST measure the distance between the 2 top holes in your existing plastic to know which plastic you need. The sizes are 1-1/2″, 2-1/2″ and 4″.