ST-Ex SERIES ST45ML-Ex Type: LED Steady Type Voltage: DC:12V,24V AC:12V,24V Dimension (mm): Diameter: Ø45 Height: 114-278 Materials: Lens-PC Housing-PC Protection rating: Ex nR ⅡT6 IP54 STB45ML-Ex Type: LED Steady Type Buzzer volume controllable type (Max. 80dB at 1m) Voltage: DC:12V,24V AC:12V,24V Dimension (mm): Diameter: Ø45 Height: 153-317 Materials: Lens-PC Housing-PC Protection rating: Ex nR ⅡT6 IP54