Optek Technology OPB11782, Optical Sensor10 PieceCondition:* New, Old Stock. Never Put Into Service. In OEM Bulk Packaging. As Pictured.Additional Notes:* Quantity: 10 Piece* Slotted Optical Switch* Features a Built-In Bracket For Easy Mounting* Mounting Hole Space Center To Center: 1 Inch* 4-Wire: Black, Red, Green and White* Wire Length of 24* Slot Width: 0.375* Slot Depth: 0.430Optek TechnologyOPB11782