Features:
1、F5 Medium Efficiency Pocket Air Filter is available in efficiencies of 40-50% on 1-5 micron particles;
2、F6 Medium Efficiency Pocket Air Filter is available in efficiencies of 60-70% on 1-5 micron particles;
3、 F7 Medium Efficiency Pocket Air Filter is available in efficiencies of 80-85% on 1-5 micron particles;
4、F8 Medium Efficiency Pocket Air Filter is available in efficiencies of 90-95% on 1-5 micron particles;
5、Large air flow, low resistance;
6、High dust holding capacity;
7、Be reusable after being washed repeatedly.