Our organic fertilizer production line equipment is primarily constructed from boiler steel (Q235B), with certain parts crafted from standard carbon steel. For the packing machine specifically, stainless steel is used for the interior. The thickness of the iron components varies by machine and model but is in compliance with national standards. In terms of durability, you can expect a life expectancy of 8 to 10 years from our equipment, although this can vary based on maintenance routines, operating conditions, and general care.