The Bionaire Odour Reducing Filter Booster is a set of four black carbon filters designed for use in air purifiers. Made with activated carbon filtration technology, these filters effectively reduce odors and clean the air in your home. Manufactured in Mexico, the BAPF31CF4PK-CN model from Bionaire is a reliable choice for improving indoor air quality. Easy to install and providing efficient filtration, these carbon filters help create a healthier environment in your living space.