Nispira premium True HEPA with Preliminary filter replacement compatible with Miko Ibuki air purifier model C102, model MA-18, Okaysou AirMic4S. Preliminary filter traps large particles such as hair, dust. True-HEPA captures up to 99.97% of particles, as small as 0.3 microns. 1 pack included. Suggest to replace filter every 6 months to optimize performance. Easy to install. Dimension 6.75 x 6.75 x 5.4". Quality meets or exceeds leading national brand. This is not an OEM product. Miko is a trademark or registered trademark of its respective holder. The trademark holder is not affiliated with Nispira and does not endorse this product. Any use of the name Miko or model designation for this product is made solely for purposes of demonstrating compatibility.