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Hi there,I am not a retailer or wholesaler. But in light of the coronavirus virus in HK, I would like to place bulk purchase of masks for my community without making any profits, especially those working class families who cannot afford to buy them. 1.How high is the Bacterial Filtration Efficiency (BFE) ? Any photo of proof? 2.How high is the Particle Filtration Efficiency(PFE?)? Any photo of proof. 3.Can the order be packed into a box of 50 pieces each? 4.Would be able to deliver them all to a HK address? And when do you expect the order can arrive HK at earliest?5. How much will you charge if I order 200000 pieces? I look forward to hearing from you and I appreciate your help.Please let me know if you have any questions. Many thanks. Pan