Buy Zinc Sulfide Concentrates, Lead Concentrates

Zinc sulfide concentrates, lead concentrates wanted for China Product: Zinc sulfide concentrates Quantity:50,000 to 100,000 MT per month x 12 months. Specifications: Zn 45% - 50% As 1.2% (max) Sb 40% (max) Fe 19% (max) Sio2 8 % (max) Cu 3% (max) Ni 0.008% (max) Co 0.01% (max) CD 0.1% (max) In 0.01% (max) S 28% (min) Product name: Lead concentrates Quantity:30,000 to 50,000 MT per month x 12 months. Specifications: Pb 45% min. (we prefer 60%). Destination: Shanghai port/huangpu port, China Payment: Irrevocable letter of credit. Contract length: Long term