The Sparco Nickel-Plated Chromed Steel Call Bell emits a clear, clean ring that's heard from far away. It's perfect for the service desks at hotels, offices, hospitals and more. Features a nickel-plated, polished steel bell with a steel base. The bell has a 2 3/4in. diameter, and the base diameter is 3 3/8in.. Sparco Nickel-Plated Chromed Steel Call Bell, Silver/Black is one of many Call Bells & Counters available through Office Depot. Made by Sparco.