Brass Marine Magnetic Compass with Aluminum Seat is a kind of automatic liquid-filled marine compass. The unique design of aluminum seat reduces the weight of the compass and makes the compass light in weight. It has good weathering resistance, high precision, reliable performance. Besides, this compass is easy to install. We offer two available types of the compass, their dial diameters are 150mm and 190mm. The compass is designed and manufactured under exacting standards, the quality is guaranteed.