Utopia is one of the leading sellers of HEPA FILTER. We offer very high quality products which meet the DOE (United States Department of Energy) standard. HEPA filters are composed of a mat of randomly arranged fibers. The fibers are typically composed of fiberglass and possess diameters between 0.5 and 2.0 micrometer..https://www.utopia.com.sg/our-products/hepa-filter
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