HQRP 2-pack Washable Post Motor Filters for Bissell 87B4, 87B43, 3920, 39209, 3920C, 3920G, 3920M, 3920R, 87B42, 87R4Y Pet Hair Eraser Vacuum plus Coaster HQRP&reg; 2-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!