This Harmony 9001K is a head for a metal pilot light, without a cap, and is supplied with 220-240V. It has a chromium-plated metal bezel and an incandescent BA 9s bulb. It is easily installed into standard 30mm diameter panel cut-outs and connected to control circuits with classic screw-clamp connections. It is impact-resistant, dust-resistant, water-resistant, and vibration-resistant thanks to its NEMA 1/2/3/3R/4/6/12/13 ratings. It complies with CE, UL listed file E42259 CCN NKCR, and CSA LR25490 class 3211 03 certifications. A dedicated cap needs to be purchased separately. Harmony 9001K is a range of heavy-duty chromium-plated metal pushbuttons, selector switches, pilot lights, and specialty operators.