Cast iron grill plate.
Pre-seasoned.
High temperature capability - remains hot for a long time after heating.
High emissivity - the surface releases a lot of thermal energy through emission, i.e. you not only cook the surface which is in contact with metal, but also the food above it.
Suitable for all cooking hobs - electric, gas, ceramic, halogene and and indiction.
Don't use in the dishwasher.
