Product material: carbon steel + plastic Product size: bottom diameter 8.5CM high 5.5cm Features: Made of high-quality stainless steel metal with chrome-plated surface and smooth surface. Silver top and matte black bottom create a modern and professional look for any workplace. Loud and Pleasant: These bells are highly durable and built to last to maintain their functionality after multiple uses. These bells are loud enough to get attention as needed, but it's also a pleasant noise that doesn't cause discomfort. The base is non-slip so it won't move and damage your table, desk or countertop. MULTI-FUNCTIONAL: These bells also have many uses around the home. They can be used as a bell replacement in board games, or even used in tournaments or professional gaming/sporting events as a fun way to start a game.