Made of solid brass. Comes in a brushed or polished brass finish. The 3-1/8″ to 5-1/2″ bobs will accommodate a pendulum rod with a width no more than 3/4″. The largest size bob we carry of 6.5″ will accommodate a 1″ wide rod. These are intended for use on mechanical clock movements only. Because of their weight they cannot be used on battery movements. Please see specifications below:
PB-01 and PB-02: weight is 2 ounces
PB-03 and PB-04: weight is 5 ounces
PB-05 and PB-06: weight is 6 ounces
PB-07 and PB-08: weight is 8 ounces