Fairing Block for GT30 Series TransducersUse our fairing block to position your GT30 series of thru-hull scanning transducers parallel to the water line for increased sonar accuracy. If the deadrise angle of your mounting location exceeds 5 degrees, you should use a fairing block to mount the device. Compatible Devices:Garmin GT30-THGarmin GT30-THPGarmin GT34UHD-THGarmin GT34UHD-THPWARNING: 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.