Item Type: Pre-Wired Round LEDs Material: Brass chrome plated Uses: Car modification, computer modification, access control switches, CNC machine tools, industrial control instruments Installation Size: M12 x 0.75 Voltage: 3-6V Function: Common cathod electrode Light Source Type: LED Working Temperature: -40~70/-40~158 Working Humidity: 10%-90% Shade Type: Flat head Protection Level: IP67, IK10 Size: Approx. 12mm / 0.5in Features: Common Cathod Electrode Means: 2 color indicator lights share a negative electrode After selecting the common cathod electrode, the black line is the common negative electrode, the red line is the red light (positive), the green line is the green light (positive), red and yellow, red and blue are the same.1More than 10,000 hours of service life, uniform light emission, very practical. 2Environmental protection and drop resistance, high accuracy CNC machine cutting technology and one?piece metal shell. 3Common cathod electrode means 2 color indicator lights share a negative electrode. 4Adopt fire?resistant wire, enhanced conductivity, high temperature resistant flame retardant base, flame retardant in emergency. 5The waterproof LEDs has built?in waterproof sealing ring, waterproof and dustproof. 4 x LED Indicator 4 x Compression Nut 4 x Washer