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Works on 1/2" NPT conduit mount beacons Can be modified to work with other lights (1/4"-20 center mounting threads) Uses a built-in pump to secure the hold of the suction cup, with an indicator for suction loss Includes 1 suction cup with pre-installed hardware for 1/2" NPT mounting Please see SWS policy regarding temporary mount solutions., SPECIFICATIONS: Warranty: 1 Year. Ship Weight: 3.0 lbs.