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<http://schema.org/description>
"This disposable heating and air conditioning filter has a one-piece chipboard frame. This feature eliminates the problems associated with a fourpiece frame, such as broken corners and exposed metal edges. The Pinch Frame filter utilizes a heat seal to bond the frame to the filter media. The media is made of 100% nonwoven polyester synthetic fibers chemically bonded with a fire retardant resin. Because of the synthetic nature of the fiber, the media is extremely resistant to moisture and other environmental extremes."
<https://www.rememberthefilter.com/products/heavy-duty-spun-glass-12-filters-11655-012030>