High quality: high quality wiring, 22 AWG wire, copper wire inside extra thick, can withstand current voltage 2A, 300V. 3 pin cable: plug and use, no soldering needed . Red Wire - VCC (RAMPS+), Black Wire - GND (RAMPS -), Green Wire - SIGNAL (RAMPS S). Suitable Temperature: Limit switches have a wide insulation temperature range and can reach up to 80 degrees.Easy to use: It is not easy to remove, and it is convenient to plug and unplug. For ease of use, the socket on the other side is integrated and can be used directly by plugging it in. Wide application: e.g. Makerbot Prusa Mendel RepRap Mega 2560 1280 CNC RAMPS Arduino 1.4. Note: The data is all manual measurement, please allow 1 - 15cm error, due to the light and display difference , there will be some color difference, depending on the physical object received.