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Will pollen clog the stainless steel micro-mesh holes?
We use a 30 mesh (that is 30×30 holes/square inch) which is more effective than smaller hole sizes at keeping out pollen. The 30mesh that we use is the perfect size for managing rainwater into the gutter while keeping out all the leaves, pine needles, and even the roof grit. If pollen ever did clog an area of the micro-mesh, you can unclog it with a gutter cleaning brush like ours found here.