The SPT-10 PAD 33"x33" by Koch Filter Corp is a high-efficiency air filter pad designed for large HVAC systems. Measuring 33 inches by 33 inches, it provides extensive filtration coverage. Constructed from durable materials, this pad effectively captures dust, allergens, and other airborne particles, ensuring cleaner indoor air. Each carton contains eight pads, making it a cost-effective choice for ongoing maintenance. The SPT-10 PAD meets industry standards for performance and reliability, making it suitable for both residential and commercial applications.