HQRP HEPA Filter 4-Pack for Eureka Boss SmartVac 4870K-1 4870K-2 4870MZX 4874 4870MZ-1 4870MZX-1 4870MZ-2 4870MZX-2 4870PZ 4870PZ-1 4870AT 4870BT 4870 Vac Vacuum Cleaner Upright Coaster HQRP&reg; Four Hepa Filters plus HQRP&reg; Coaster; This Glass Fiber Paper HEPA Filter is H13 filtration class and retains 99.99% of particles down to 0.3 micron; Compatible with Original filter; 2 weeks DOA replacement warranty!