The AMX FX20-RF 3-in-1 200mm Replacement Filter Pack is a great way to service your AMX FX20 200mm 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 200mm sized filter fits into the AMX FX20 Filter Box whenever ventilation maintenance is needed. FEATURES: 3 Layer Replacement Filtration System Primary Active Carbon and HEPA Filter High Efficiency Easy to Install Designed for AMX FX20 Filter Box SPECIFICATIONS: Number of Filters: 3 Filters: Primary Filter Active Carbon Filter HEPA 12 Filter Compatibility: AMX FX20 Filter Box WHAT'S IN THE BOX: AMX FX20-RF 200mm Replacement Primary Filter x1 AMX FX20-RF 200mm Replacement Active Carbon Filter x1 AMX FX20-RF 200mm Replacement HEPA 12 Filter x1