Raymarine Bronze Thru Hull B258 W/Block

The Raymarine Bronze Thru Hull B258 W/Block is a professional-grade transducer assembly designed for anglers and boaters who demand accurate sonar performance in both freshwater and saltwater environments. Built to withstand years of heavy use on the water, this thru-hull transducer integrates seamlessly with Raymarine's proven echo sounder lineup, delivering the reliable depth and fish-finding capabilities that serious anglers depend on for consistent results. Whether you're fishing tournaments, running commercial operations, or pursuing trophy species, this bronze thru-hull assembly offers the durability and precision needed when conditions matter most.

The B258 thru-hull design uses a bronze construction that resists corrosion in saltwater applications while maintaining excellent signal transmission through the hull. The included block mounting system provides secure, vibration-free installation that eliminates false readings and enhances sonar clarity—critical when differentiating between fish, structure, and bottom composition. At 20 pounds, this assembly is engineered for permanent installation on vessels where stability and long-term reliability cannot be compromised. The transducer's design optimizes frequency response and cone angle for detailed bottom imaging and fish detection, ensuring you see what's beneath your boat with the clarity that translates to more fish in the boat.

This thru-hull transducer is compatible with the full Raymarine DSM series (DSM250, DSM300) and works flawlessly with SL Series (SL755RC, SL760RC, SL1250, SL1250RC), hsb2 Plus Series (L755RC, L760, L760RC, L1250, L1250RC), and hsb2 HDFI Series (L770D, L770DRC, L1260D) echo sounders. Installation requires hull penetration and proper sealing, making professional installation recommended for vessels where water integrity is non-negotiable. Anglers operating multi-day trips or commercial fishing operations will appreciate the bronze construction's proven track record—this is the transducer choice when your income or livelihood depends on knowing what's happening below the surface.