NRP air filter specifically for LV H128 Desktop Air Purifier can maintain peak performance. Use H13 HEPA for good quality and longer lifespan closeup to the OEM. 3‑stage filtration system — Pre‑filter, H13 True HEPA and activated carbon work together to remove dust, pollen, pet dander, odors, and VOCs. Removes 99.97% of particles down to 0.3 microns for cleaner indoor air and allergy relief. Long lasting performance — Typical replacement interval 6-8 months under normal household use to maintain peak efficiency. Easy to install — Filters are sealed in plastic bags from factory to make sure they are brand-new condition; simply unwrap and slide into the purifier, then reset the filter indicator. Filter dimensions approx. 170*118*29 mm = 6.69 x 4.65 x 1.14 inches, Weight: 0.11 Pounds, Manufacturer: NRP