Custom Made to your Specifications , +/- 1/8". Made of a heavy duty washable aluminum media and an aluminum metal frame; our metal Economizer / KKM Filters (also known as Mist Eliminators) are suitable for residential, commercial and industrial applications. With a large filtering area, high dust holding capacity , uniform loading and low resistance to air flow; these filters are a permanent solution to disposable filters. Available in 100's of different sizes as well as 1/2" , 1" and 2" thicknesses. Easy to clean with any mild detergent and rinse with water to remove collected dust. Free Shipping on Most Sizes.