We would like to import copper concentrate (>18%)、 lead n zinc concentrate (>50%) in powder version、 copper scrap being packed together、 quantity is around 500-1000mt month for each type. We only do L C for payment terms、 not T T. Please supply us with:1. The certificate of analysis2. Quotation: CIF price Hai Phong (Vietnam)3. Payment termsLooking forward to your replyThanksAnh