We are supplying comprehensive raw materials of welding consumables. The specs for ferrosilicon shows as below:Si (%): 43.0-46.0 or 70.0-75.0 C (% max): 0.1 or 0.08 P (% max): 0.04 S (% max): 0.03 Mn (% max): 1.0 or 0.3 Al (% max): 1.0 or 2.0 Size: -60 mesh / -80 mesh or according to customer's requirement Packing: according to customer's requirement