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Replacement rotor for knotmeters made by Signet Instruments.
• New shaft
• Two replacement O-rings that seal the transducer to the thru-hull
• Silicone grease for proper lubrication of the O-rings when the transducer is slid into the thru-hull.
Note: This part will not fit any instrument manufactured by other companies. I will only fit those made by Signet.