Brass base, hand-blown Murano crystal glass. Bulb Brass is the newest member of the Ingo Maurer Bulb family. Based on the world-famous 1966 design, the Ingo Maurer team has developed a brass version. The lamp's handcrafted base is made of high-quality brass. The untreated brass surface tends to change over time, giving it a special character. A patina is created, a surface created by natural aging. Patina is the result of everyday use and is perceived as an aesthetic gain, as it represents a characteristic material property that can ultimately be understood as the user's individual signature.