Open your door... do you have a storm door behind it? That mesh in there is "window screen". You can get it cheaply at Home Depot or Lowes, or just about any hardware store. Metal or plastic varieties.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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