Plastic flush mount thru the hull transducer.  Dual Beam, 20/60 degree, 200/83kHz.  Shaft diameter: 2", Bottom diameter: 3",  Depth: 3.3" thread length, 3.67, 3.67 full length, 0.22" (below hull). Cable Length:  20 Feet.  No fairing block required.  

• Transducer_Compatibility_Guide.pdf
• 532651-1EN_A_Transducer_Resource_Guide.pdf
• 531953-3_B_HELIX_Start-Up_Notice.pdf
• 530759-2_E_Flush_Mount_Transducer_Installation_Guide.pdf
• 2022_Humminbird_Accessory_Resource_Guide.pdf
• Transducer_Compatibility_Guide.pdf
• 532651-1EN_A_Transducer_Resource_Guide.pdf
• 531953-3_B_HELIX_Start-Up_Notice.pdf
• 530759-2_E_Flush_Mount_Transducer_Installation_Guide.pdf
• 2022_Humminbird_Accessory_Resource_Guide.pdf