This replacement filter is compatible with Shark Air Purifier models HP100, HP102, HC450, and HC452. It is a true HEPA high-efficiency 3-in-1 filter with a filtration technology that ensures clean air in your home or office. The filter life is approximately 6 months, and the unit quantity is one. This filter is ideal for those who want to improve their indoor air quality and maintain a healthy living environment. It is perfect for use in air purifiers, heating, cooling, and air conditioning systems. Get your hands on this replacement filter today and enjoy the benefits of clean, fresh air.