Philmore 11-2649, BLUE 1" Inch Round Tapered LED Indicator Lamp 12-14 Volts DC, for 22mm Mounting Hole. The K series is a screw based indicator that is mounted in a 22mm (7/8”) cut out and is fastened to the panel with a plastic nut and sealed with an “O” ring gasket for a tight panel seal. Nut & “O” ring are included. Illumination is achieved by means of surface mount LED’s on a sealed PCB board hich provides bright and even lighting. The K series LED indicator is available in 5 colors with two transparent lens style: flat with diffuser and tapered with diffuser. The K series is available in 12V DC and 28V DC, screw clamp type terminal designed for quick termination for both solid and stranded wires. Electrical: Dielectric withstanding voltage: 630V - terminal to housing Insulation resistance: 380V AC - terminal to housing Surge protection: 2000V @ 50 micro seconds Materials: Housing: PBT w/20% Glass Lens: Polycarbonate Diffuser: POM (polyacetal) Hex nut: Polycarbonate