Horticultural Insect Screening will keep the bugs out from the start! Cover your inlets and openings in your grow room with this white tight-knit screening. This 19" x 20" section of screen will keep the smallest of insects out of your area. If you are running an intake fan, you are more than likely pulling small insects into your grow area. Don't worry, this durable material will allow you to clean and reuse the screen many times over.