Simplex 4903-9168 Category : Simplex This is a Speaker/Strobe. The strobe’s rating is 15 cd. Brand SimplexModel 4903-9168Manufacturer SimplexType Alarm (Speaker/Strobe)
Simplex 2901-9333 Category : SimplexThis bell is compatible with some of Simplex’s strobe plates, such as the Simplex 4904-9139.