Brass is a metal alloy made primarily of copper and zinc. The proportion of copper and zinc can vary, depending on the intended use and desired properties of the brass. Typically, brass contains anywhere from 60% to 90% copper and 10% to 40% zinc.

Brass is known for its golden yellow color, which can range from a bright, shiny hue to a duller, more muted tone. It is also valued for its durability and resistance to corrosion, making it a popular material for various applications.