RAM Flat Surface Marine Electronic Mount for the Eagle Cuda, FishEasy, Humminbird Piranha & Lowrance X-4The RAM-B-107-1U, powder coated marine grade aluminum mount, consists of a double socket arm, one 2.5" diameter round base and connecting Humminbird/Eagle/Lowrance marine base. The mount is designed with a 1" diameter patented rubber ball and socket system that has adjustment points at the cradle base and bottom base. With a twist of the arm knob, you can move the marine mount to your optimum viewing position. This mount is compatible with the following electronic devices: Eagle Cuda 240iEagle Cuda 240Eagle Cude 168Eagle Cuda 128Eagle FishEasy 320CEagle FishEasy 240 Humminbird Piranha MAX 20Humminbird Piranha MAX 15Humminbird Piranha MAX 10Lowrance X-4Lowrance X-4 ProMaterial: Powder Coated Marine Grade Aluminum Ball Size:1" Rubber "B" Ball Size This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.