This Murata piezo element is a quality unit, housed in a rigid plastic shell.

Specifications:

• 22Ø x 7mm thick (0.87″ x 0.28″ thick)
• 70dB sound pressure level (measured 3V P-P square wave, 10cm)
• 25V peak-to-peak maximum operating voltage
• 17nF +/-30% capacitance
• -20 to +70C operating temperature