B117 Bronze Thru-Hull Transducer w/Humminbird #9 Plug - 7-PinThe B117 features our 50/200 kHz, dual-frequency, single ceramic element in a low-profile housing. The nearly-flush design minimizes drag with only 5mm (3/16) extending outside of the hull. The plastic P319 and stainless steel SS60 models are also available to accommodate all hull materials.FeaturesIndustry standard for low-profile transducersDepth and temperatureGood target detail in shallow-water at 200 kHz and good deep-water bottom tracking at 50 kHzRight angle cable exit offers low headroom and protection when transducer is stepped onIncluded rubber washer allows tightening of the hull nut to irregular hull surfacesHousings are ABYC H-27 compliantOptional temperature sensorBronze transducer housingBoat Size: 8M (25') and upSpecifications:Weight: Bronze - 0.9 kg (2.0 lb)Hull Deadrise: Up to 8degAcoustic Window: UrethaneHole Diameter: 51mm (2)This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.