370x215x115mm ammeter boxes Corrosion resistance; Light weight, high strength and ... , thus rendering high safety if used as enclosure of an electic device. 2.Corrosion resistance:Good corrosion resistance, resisting ... with specific gravity between 1.75-1.95, being an idea substitution of ordinary plastics.4.Microwave-through property: ... a smooth and luster surface without cracks. frp ammeter boxes