Simrad B258 Bronze Thru-Hull 9-Pin

The Simrad B258 Bronze Thru-Hull 9-Pin transducer is purpose-built for serious anglers and boaters who demand reliable sonar performance in saltwater and freshwater environments. This bronze thru-hull unit integrates directly into your hull, offering a permanent mounting solution that eliminates the performance inconsistencies of transom-mount alternatives. Whether you're running offshore for marlin or working shallow flats for redfish and permit, the B258 delivers the stable, high-frequency sonar clarity that puts fish on the deck.

Constructed from marine-grade bronze, this thru-hull transducer resists corrosion and maintains signal integrity even in saltwater conditions where inferior materials would degrade within seasons. The nine-pin connector interface ensures seamless compatibility with Simrad sonar systems and integrated navigation displays, while the thru-hull design eliminates water flow noise and deadband issues common with transom units. Bronze construction also provides superior heat dissipation, keeping the transducer operating at peak sensitivity during extended fishing days under direct sun exposure.

Installation requires hull penetration and professional bedding to prevent leaks, making this transducer ideal for vessel owners committed to long-term sonar performance rather than weekend casual anglers. The B258 pairs seamlessly with Simrad's full lineup of chartplotters and sonar units, giving you integrated fish-finding, navigation, and mapping on a single display. Weighing 15 lbs, this unit demands proper through-hull mounting infrastructure, making it best suited for center consoles, sport fishermen, and serious cruising vessels where permanent installation justifies the investment.