RealVision 3D Transducer Extension Cable - 5M16RealVision 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. SpecificationsType ExtensionBox Dimensions 2H x 10W x 10L WT 1.5 lbsU