HQRP Cartridge Filter 2-Pack for Shop-Vac 4045 12B225A 12B300A 12RT300 14RT400A 16RHT650C Vacuum Cleaner Coaster HQRP&reg; Two Cartridge Filters Replacement plus HQRP&reg; Coaster; HQRP filters are washable and reusable! This PP compound filter is H12 filtration class and retains 99.97% of particles down to 0.3 micron; Compatible with Original filter; 2 weeks DOA replacement warranty!