1、BFE > 99% * @ 3+/- 0.3 microns 2、PFE > 98% * @ 0.1 microns 3、Breathing Resistance < 10Pa * @ flow rate: 8L/min 4、Aluminum nose clip, ensures perfect fitting 5、Fluid resistant ≥ 160mmHg 6、Biocompatibility approved 7、Individual packed, ETO sterilized 8、Size for kids is available