Shida HF0411 KN95 filter cotton

Shida HF0411 filter cotton
product standard: meet the KN95 standard.
Product introduction:
particulate matter pre-filter cotton provides users with particulate matter filter protection and prolongs the useful life of the filter cartridge.
This product is an accessory for the anti-virus half-mask. It must be used with the FH0501 single filter box half-mask.
All the products of the spray paint combination are FH0501, FH0502, HF0411, HF0112. Four products must be used together, and none of them are indispensable.