Specification: Type: LJ18A3-8-Z/BX Supply Voltage : DC 6-36V Detection distance: 8 mm Switching frequency: 200MHZ Current Output : 200-300mA Output form: NPN DC three-wire normally open Output level: low level (when there is metal) Output indication: LED (red) Detection substance: metal Line length: 115cm Nut size: M18 Product size: 18mm in diameter, 68mm in total length The package includes: 2 x Inductive Proximity Switch