A thru-hull transducer mounted on a hull with more than 5 degrees of deadrise needs a fairing block to sit parallel to the waterline — without it, sonar performance suffers. This Garmin replacement fairing block restores proper alignment for GT21, GT23, GT41, GT50, and GT51 series thru-hull scanning transducers, keeping your readings accurate and consistent.

Specifications:

• Replacement fairing block for Garmin thru-hull scanning transducers
• Compatible with GT21, GT23, GT41, GT50, and GT51 series
• Required when hull deadrise angle at the mounting location exceeds 5 degrees
• Orients the transducer parallel to the waterline for consistent sonar accuracy

⚠️ California Prop 65 Warning: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.