The SPT-10 PAD 19"x19" by Koch Filter Corp is a high-performance air filter pad, perfect for various filtration needs. Each pad measures 19x19 inches and is sold in a convenient pack of 25. Constructed from quality materials, this pad effectively traps dust and allergens, ensuring cleaner air in your environment. Its versatile design makes it suitable for use in multiple applications, including HVAC systems and air purifiers. Easy to install and replace, the SPT-10 PAD is an essential component for maintaining optimal air quality.