PPI Black Polyurethane Air Filter Foam Sheet for Pre-Filtration
High-quality, open-cell Black Polyurethane (PU) filter foam, ideal for dust collection and pre-filtration in a wide range of devices. Density is defined by PPI (e.g., 20 PPI to 60 PPI) to meet specific filtration efficiency needs. Excellent elasticity, fire-retardant options available, and easily cut into custom pads or used as bulk sheet material. Widely applied in air conditioners, dehumidifiers, and electronic equipment.