Dear Sir, We are a big producer and Micronize manufacture of Gilsonite " Natural Asphalt & Natural Bitumen" in Iran with produce line of 5000MT, our products use in asphalt and Bitumen as they increase quality of Bitumen and asphalt also decrease cost of asphalt and road construction as it can mix with bitumen 60/70 and crush rubber and other polymers also separate for produce of modify bitumen. we are in exporting on the world with regular shipment monthly we are pleased to inform you full details of our products in attachment and as the below:Gilsonite "Natural Asphalt , Natural Bitumen"HS.CODE: 27149000Grade: CH-108 CH-109 CH-110Spec: Ash