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Bore Size: 40mm, Thread Type: Rc (or M Thread for 20 & 25 Bore), Finger Option: Flat Finger Mounting Style (Standard), Auto Switch: M9NWV--Solid State, 2-color Indication, 3 Wire NPN, Vertical, Lead Wire or Prewired Connector: 1.0m Cord Length, M8-4 Pin Connector, Number: -