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Dear Sir/Madam,Regarding to the product description, it states the mask offers Bacteria Filtration Efficiency.may i know how many% Bacteria Filtration Efficiency is?Plus, does the mask any test for Particle Filtration Efficiency? or any test with particle size =/ 0.1um.Delivery to HK, target volume 250,000pieces (5000 boxes of 50pieces)Best Regards,Terence