I will buy EN590 10 ppm with a volume of 100,000 tons - up to 500,000 tons per month.x12 . according to the annual contract. FOB Rotterdam TANK TO VESSEL.Payment after the DIP TEST.Price: 390$-510$ TANK TO VESSEL TTV. Payment is strictly at the port of loading after the immersion test DIP TEST.Payment is not made before the immersion test, Give us such a procedure with the price on the seller's letterhead.