The MD-20 PAD, sized 18"x25", is packaged in sets of 25 by Koch Filter Corp. This pad is engineered for high-efficiency air filtration, effectively removing dust and other particles from the air. Its dimensions make it suitable for various HVAC systems, ensuring optimal performance in diverse applications. Constructed from quality materials, the MD-20 PAD is designed for durability and long-lasting use. Compliance with industry standards ensures that it meets necessary performance criteria, making it a reliable choice for maintaining clean air in both commercial and residential environments.