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Material Name : Colemanite ( 43 Percent B2O3) Size : 75 Microns ( Content 82 Percent Min) Specifications: B2O3 : 42 to 43.5 % CaO : 21 to 26 % SiO2 : 3 to 7 % Max MgO : 1.5 to 3 % Max SO4 : 0.8% Max Al2O3 : 0.3 to 0.8 % Fe2O3 : 0.5% AS : 950 PPM SRO : 2.5 % Quantity: 60,000 MTS Annually Pl quote CIF Kolkata Port in 20 ft Containers Please let us know if the above material can be supplied on a regular basis. Shekhar Singh Director Kancara Resources Pvt. Ltd Mobile : +91-*****