After one week confirmation , USA New customer purchased 600pcs dust air filter from our factory , 170pcs P614775 , 230pcs P191280 and 200pcs P191281 . This type filter we have been using superior filter material , blue flame retardant paper , and inner bottom end cover plastic with AB glue ,this ensures filter element’ service life . In communication with customers, we provided complete tech parameter and real production photos for confirmation , and about delivery , we considered danger of air filter transportation ,carefully check the qty and total volume of wooden pallet , compared sea freight for them , just wait their final news , because it for tender . Unexpectedly, the customer came to me for negotiation, his boss wanna USD38/per , I sincerely explained that price we cant do based on our current filter material and workmanship , didnt push customer and to say more . All I know is that customer looked for one Hebei supplier from Alibaba , I helped them check this company nature and ability . To my surprise, after three days, the customer told me “Hello,  we had a meeting today and decided to order the filters from your company” , and finished payment 100% TT in advance on Alibaba in same day .