XQ True HEPA Replacement Filters and Carbon Winix XQ 2 Pack Brand new 2 filters and 2 carbons The XQ True HEPA Replacement Filter X is compatible with the Winix XQ and XQ Pro Tower Air purifiers. This filter set includes 4 units and is made of HEPA material to efficiently remove airborne particles and allergens. With a size of 2 sets and a product grade of new, this replacement filter provides clean and fresh air for your home or office environment. The True HEPA filtration technology ensures that your air is purified from microscopic particles, making it ideal for those looking to improve their indoor air quality.