435-6P1 - 

Adaptable® Brand 340 Series AC Vibrating Bell

Applications: 4" sizes recommended for quiet office areas; 6" sizes for moderate noise level areas such as general factory areas; 10" sizes for loud areas such as heavy machine shops.
AC vibrating bells produce a long continuous ringing sound. The striker continues to strike the gong in rapid-fire action as long as current is applied. Available with full cast grids and protective grilles. May be weatherproofed with the addition of a weatherproof box.