Replacement HEPA Filter (20”x15”), designed specifically for Shroomagic laminar flow hood. This H13-grade filter provides 99.95% efficiency at 0.3 microns, ensuring a sterile environment for mycology, mushroom cultivation, and laboratory work. The filter is equipped with EVA foam sealing tape, which provides a tight, secure fit to block air leakage and ensure consistent laminar airflow Crafted for durability and precision, the filter features a convenient handle design that makes replacement fast and hassle-free. Please note that the HEPA filter is not washable—for optimal performance, replace it based on usage frequency and visible discoloration.