Type: 4 Sets Mechanical Endshop Limit Switch with 70cm 3-Pin Connecting Cable High Quality Switch Elements: Made of 22AWG wire, thick copper wire to 2A current 300V voltage, up to 80 Celsius large temperature range of insulating layer. Convenient to Use: Equipped with 3Pin male/female connector head, plug and play, easy to install. Common Style: Fit for RepRap 3D Printers or CNC machines, it is supported by RepRap electronics, RAMPS 1.4 and other popular RepRap boards. Wire Connection: connects to VCC (ramps +); Black line connects to GND (ramps -); Green line connects to SIGNAL (ramps s) colour:Red+black Material:Electronic component Package Contents: 4 x mechanical stop block 4 x 3Pin line Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.