55-5000 - Audio Transducer 3-8V/PCB
The 41.T79P050H-LF is an audio transducer that accepts 3-8v power and is a PCB mount design.
Mfr Name: Distributed By MCM
Mfr Number: 41.T79P050H-LF
35-610 - Piezo Electronic Element (Transducer)
Commonly used in alarm glass breakage detectors Works as microphone or buzzer Generates voltage when flexed by sound or pressure Ten per package
Mfr Number: 20EB002
I have dealt with MCM Electronics a number of times and have been more than satisfied.