HQRP 2-pack Washable Post Motor Filters for Bissell 89Q9, 18Z6, 89Q9P, 89Q9C, 89Q9D, 89Q9K, 89Q9R Lift-Off Multi Cyclonic Pet 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!