Double spring for Fimar cast iron plates. It is part of the balancing system of the upper plate on Fimar double cast iron griddles (e.g. PE25/PE35/PE50 series), which the manufacturer describes as a "self-balanced upper plate": the double spring supports and counterbalances the weight of the upper plate, letting it lift and adapt to the thickness of the food while keeping cooking pressure even.

• Brand: Fimar
• Application: double cast iron plate
• Type: double spring

Replace it when the upper plate no longer lifts/closes properly, stays stuck in position, or no longer applies even pressure on the food: these are typical signs of a worn or broken spring.