Our client needs to buy low sulfur straight run fuel oil .The sulfur should not be higher than 0.5or0.8,the vanadium and sodium content should be lower than 30. The first shipment will be 10,000 to 15,000 M/t, after that the monthly shipment could be 15,000 to 50,000 for a longer period.1)We need the seller to provide the certificate of delivery and operational capability. 2)We can provide the L/C issued by Chinese bank, the L/C will be issued according to each transaction monthly. 3)The seller should consign the SGS in destination port for inspection, the inspection certificate will be the L/C negotiate document. 4)Please provide the detailed specification(including the content of the heavy metal)