Please advise the best premiums for the following as long term basis:  A. Pure lead Lead ingot: 99.97% purity for making battery plate Destination: Chittagong, Bangladesh  Quantity: 100 metric tonne in 5 containers (max 20 metric tonne per container) per month for 12 months.  Payment: 100% LC at sight only, no TT or down payment.  Premium required: CFR Chittagong, Bangladesh.  B. 2.75% Antimonial lead Chemical composition:  Antimony(Sb) 2.50 - 3.15% Tin(Sn) 0.10 - 0.14% Arsenic(As) 0.21- 0.26% Selenium(Se) 0.015 - 0.035% Coper (Cu) 0.02 - 0.05% Lead(Pb) Rest Impurities:  Zinc(Zn) 0.005%(max) Bismuth(Bi) 0.03%(max) Iron(Fe) 0.003%(max) Silver 0.014%(max) Cadmium) 0.0053%(max) Nickel(Ni) 0.01%(max) Sulpher(S) 0.005%(max) Quantity: 100 metric tonne in 5 containers (max 20 metric tonne per container) per month for 12 months.  Payment: 100% LC at sight only, no TT or down payment.  Premium required: CFR Chittagong, Bangladesh.