Features:
Made of high quality material, it is durable and long lasting use.
Works well for Anet A8 3D printer.
Anti-jamming three-wire, 140cm / 55.1inch cable length.
Pretty solution for auto-adjusting level, convenient for use.
Comes with mounting plate and pre soldered connector, so no wiring is needed. Just unplug the original z stop and plug in sensor and screw into the back of printer.

Specifications:
Model: SN04-N 
Applicable product: For Anet A8 Prusa I3 3D Printer
Output method: NPN three wire normally open.
Connector: 3-pin (Brown, Black, Blue)
Detection distance: 5mm
Working voltage: DC 10-30V
Output current: 300mA
Sensor size: 1.8 * 1.8 * 3.6cm / 0.7 * 0.7 * 1.4inch (W*H*L)
Cable length: 140cm / 55.1inch
Color: Black and blue
Material: ABS
Package weight: 68g

Package List:
1x Auto Leveling Sensor
1 x Plate
2 x Screw