Features: Premium Material: Our home air filter are made from premium aluminum for permanence. This sturdy material ensures your filter will last longer and provide superior performance Attractive Aesthetic: These reusable furnace filters come in sleek silver colour that not only work well, but also add to the aesthetics of your furnace Basic Information: Material: aluminum Color: silver Size: 20 x 20 x 1 inch/508 x 508 x 20 mm Package Include: 4x Reusable electrostatic air filters Warm Note: Manual measurement, there may be slight differences in size Due to the screen display, the color of the item may differ slightly from the picture