Filter HEPA or ULPA   can be used in all types of clean rooms manufacturing electronic products or biological products or spaces within which air quality needs to be strictly controlled. Size (including length, width and height) can be customized. 1. High dust holding capacity 2. Different sizes available 3. Standard: H13/H14 4.Efficiency: DOP 99%, 99.99%, 99.999% at 0.3um Honesty service and pursuing perfection we are committed to providing the best products and comprehensive after-sales service for all customers over the country.#furnitur hotel#