Custom Cones Replacement Hopper Pan For Industrial GrinderHopper Pan Replacement for the Custom Cones Industrial Grinder Always helps to have a spare! The Industrial Grinder is built to last but it always helps to have a few spare parts around! The hopper pan is essential because it allows the operator to slowly add material into the grinder, so the grind is consistent. Keep your downtime at a minimum with a replacement hopper pan for your Industrial Grinder!