Sparco Call Bell - 2.75" Diameter - Nickel Plated, Chromed - Steel - Silver, - Black Color Call bell emits a clear, clean ring. Call bell features a nickel-plated, polished steel bell with steel base. The bell has a 2-3/4" diametre while the base diametre is 3-3/8". Size: 2.75" DiameterColor: Silver, Black, Silver Bell, Black Base