Details

The British 2 pound coin is a bimetalic coin, coinsisting consists of an outer yellow metal nickel-brass ring made from 76% copper, 20% zinc, and 4% nickel, and an inner steel-coloured cupro-nickel disc made from 75% copper, 25% nickel. The coin weighs 12 grams and is 28.4 millimetres in diameter. (via Wikipedia)