we are looking for the sincerely supply for the sulfur lump 3000-5000 ton per month,above 99.0%,the lump not less than 100mm,pls with us if you can supply,and pls quote your best fob and cif qingdao,china price.pls with us if you are interested payment term:Irrevocable,payable 100% L C at sight against relevant documents of loading port inspection. mail: n4