The HPFA3 30 FLTR MM BCKPL OBL 2/PK (SRV) is a high-performance filter pack designed for BROAN-NU TONE ventilation systems. Each pack includes two filters, crafted from premium materials to ensure maximum filtration efficiency. These filters are designed to fit seamlessly into your existing setup, providing superior air quality by capturing dust, allergens, and other particles. With a size of 30 inches, they are ideal for both residential and commercial applications. The filters meet industry standards for safety and performance, making them a reliable choice for your ventilation needs.