Door flaps and related spares such as flap hinges and clips for Whirlpool fridge freezers and freezers used on the storage shelves and normally they will be made from plastic.
Of course if you are unsure by all means please contact us to ensure you get the right plastic flap for your appliance.
For Whirlpool spares please give us the 12NC number from the rating plate of the appliance as this can be essential in finding spare parts.