MSC-298M Metal Frame/Mylar
- Dia: 40 mm, Height: 6.9mm
- Output: nom .1 watt and max .2 watt
- Frequency range: 480-6000 Hz
- Net weight: 9.0 g
MSC-299M Metal Frame/Mylar
- Dia: 50 mm, Height: 8.6 mm
- Output: nom .3 watt and max .5 watt
- Frequency range: 450-6000 Hz
- Net weight: 13.0 g