Signal construct sk 05 series led symbol indicators 5mm snap in mounting signal construct skhd05104 a red 5mm led panel indicator with a square lens head and a 24 to 28v acdc operating voltage the indicator is of the snap in mounting type and has a frosted lens surface that gives a high level of light transmission and a clear onoff contrast signal construct skhd05104 led indicator 5mm mounting yellow 24 28 vdcac square