12 Pack of Replacement Air Filters for Electric MAC-2300FT-E and MAC-3000FT-E Split Air Conditioners. NO FRAMES INCLUDED. Existing white insert frames must be reused with these filters. Filter media dimensions: 8.3 inches x 1.9 inches x 0.2 inches (21 x 4.7 x 0.5 cm). To replace, simply remove the old filter element from the frame and insert the new one. Replacement is quick and easy. These upgraded filters are thicker than the original, offering improved fit and performance while maintaining full compatibility with MAC-2300FT-E and MAC-3000FT-E models. Black carbon filter features carbon adhesion technology that helps reduce odors and airborne contaminants inside the unit. The blue filter layer is produced through high-temperature oxidation and incorporates a dissolving enzyme bonded to the fiber layer for long-lasting performance. This design enhances filtration efficiency and durability. The activated carbon layer provides extended deodorizing capability and improved air quality. Each pack includes 4 lytic enzyme filters and 4 activated carbon filters. High-density seamless construction ensures reliable filtration. The dissolving enzyme is securely bonded to prevent shedding and maintain effectiveness over time. For optimal performance, replace every six months. Designed for direct replacement without modifications.