When sourcing these items, the base metal is the most critical factor; common choices include zinc alloy, brass, or iron, with brass offering the highest perceived value and weight. You must specify the plating thickness, typically measured in microns (μm), to ensure durability and prevent premature tarnishing. Additionally, clarify the edge treatment (e.g., reeded, smooth, or diamond-cut) and the surface finish, such as mirror-like proof finish or matte/sandblasted effects, to meet specific aesthetic requirements.