RealVision 3D Transducer Extension Cable – 3M (10′)RealVision 3D Transducer Extension Cables work with both the transom-mounted RV-100, as well as through-hull RV-200 and RV-300 series transducers. Each extension cable features a waterproof, twist-lock connector at the MFD end and a compatible socket at the transducer end. For best performance, Raymarine recommends using no more than two (2) extension cables in any given cable run. Specifications:Type: ExtensionBox Dimensions: 2″H x 10″W x 10″L WT: 1 lbsUPC: 723193817070