HQRP Washable Post-Motor Filter 4-Pack for Bissell Pet Hair Eraser 87B43 3920 39209 3920C 3920G 3920M 3920R 87B4 87B42 87R4Y Vac Vacuum Cleaner Coaster HQRP&reg; 4-pack H11 Post-motor media filter plus HQRP&reg; Coaster; HQRP filter is washable and reusable! This filter is H11 filtration class and retains 95% of particles down to 0.3 micron. Dimensions: 9.25" x 2 5/8" x 7/16". Recommend replacing your vacuum filters every 3 to 6 months Compatible with Original filter; 2 weeks DOA replacement warranty!