This is a the perfect gift for a weather buff or angler. Historical data shows that fish tend to bite on a moving barometer, that is when atmospheric conditions are changing. The Trintec fishing barometer will help to give you some old fashion guidance. The brass case is 5 1/4 inches in diameter and the depth is 2 1/4 inches. The antique style dial displays information to show when the pressure is changing and the fish are likely to be biting. This fishing barometer comes with a 5 year manufacturers warranty.