Thanks for your contact and purchase. According to your question, the following answers hope to be helpful to you.
At first,there are two filters for the Okaysou AirMax 8L series to choose from, namely:
1.Okaysou AirMax 8L Blue Ultra-Filter Medical Grade H13 Filtration System
2.Okaysou AirMax 8L 2 in 1 Duo-Filter Carbon Filter
Besides, there are four filters for the Okaysou AirMic4S series to choose from, namely:
1.Okaysou AirMic4S Germ Defense Filter, Blue
2.Okaysou AirMic4S Pet Allergy Filter
3.Okaysou AirMic4S Toxin Absorber Filter, Green
4.Okaysou AirMic4S Odor Remover Filter, Yellow
Finally, there is one filter for the Okaysou AirMac10L Pro series to choose:
AirMax10L Pro group filters with ultrafiltration and nanofiltration system
So, you can choose the right one according to your needs.