The AMX FX15-RF 3-in-1 150mm Replacement Filter Pack is a great way to service your AMX FX15 150mm 3 Layer HEPA Filter Box. It comes with 3 replacement filters that offer high-efficiency filtration and is easy to install. The pack consists of a Primary Filter, an Active Carbon Filter, and HEPA 12 Filter for high-performance protection. Each 150mm sized filter fits into the AMX FX15 Filter Box whenever ventilation maintenance is needed. FEATURES: 3 Layer Replacement Filtr