Copper Concentrate 25% to 45% min wanted

Our company is located in the United States. We look forward to hearing from Seller who is ready for the item below. Contract work will proceed very quickly.
Item: Copper Concentrate
Purity: Minimum 25% to 45%
Size: Less than 0.037mm-1mm -10mm and not more.
Contract Period: 5 years (60 months)
Quantity: Min 20,000 MT / month X 5Years(60 months) or, Max 200,000 MT / month X 4 Years(48 mnths)
Payment Method: RDLC(CIF) – MT700 & MT103,
Destination: Port N/A, China