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.Features Industry standard for low-profile transducers; Depth and temperature; Good target detail in shallow-water at 200 kHz and good deep-water bottom tracking at 50 kHz; Right angle cable exit offers low headroom and protection when transducer is stepped on; Included rubber washer allows tightening of the hull nut to irregular hull surfaces; Housings are ABYC H-27 compliant; Optional temperature sensor; Bronze transducer housing; Boat Size: 8M (25') and up; Specifications: Weight: Bronze - 0.9 kg (2.0 lb); Hull Deadrise: Up to 8deg; Acoustic Window: Urethane; Hole 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. - cis2:mm5mnJlm -Specifications: Mounting Style: Thru-Hull; Temperature: Yes; Quick Guide (pdf)Owner's Manual (pdf)Brochure (pdf)