Brass cases are cylindrical containers made from brass, a metal alloy primarily composed of copper and zinc. They are commonly used in the ammunition industry to hold gunpowder and projectiles. The durability and corrosion resistance of brass make it an ideal material for these cases, ensuring they can withstand the pressures of firing and the elements. In addition to ammunition, brass cases can also be found in various applications, such as in musical instruments like trumpets and trombones, where they contribute to sound quality. Their attractive golden color and malleability make them popular in decorative items and hardware as well.