Raymarine CPT-120 Bronze Thru Hull w/Fairing Block - A80350CPT 120 Bronze High Speed Thru Hull Chirp Transducer with Fairing Block Raymarine's exclusive line of DownVision transducers pair a conical CHIRP fishfinding element with a wide beam DownVision element. The result is an unrivaled level of subsurface visibility. Features: MATERIAL: Bronze MAX DEPTH: DV=600 FF=900 FREQUENCY (KHz): Chirp DownVision DownVision Fishfinder BEAM WIDTH(L H): 25° 60° APPROVED HULL MATERIAL: Fiberglass Wood CABLE