We are supplying comprehensive raw materials for welding consumables. The specsof welding grade calcinedbauxite is showed as below:Al2O3: 86% min SiO2: 8% max TiO2: 5% max C: 0.05% max S: 0.02% max P: 0.04% max Size: --80mesh / -120 mesh or according to customer's requirement. Packing: In 1000kg big bag or according to customer's requirement.