PP4818 PowerPod Pre-Cut for Furuno GP1870/GP1870FPP4800 Series, PowerPods for Power are a better option than bracket mounting. PowerPods provide a clean look for flush mounting with the advantage of a swivel base.The trunion bracket that is supplied with most electronics is not optimal. PowerPods have the advantage of protecting the back of the electronics from harsh saltwater spray. Most manufacturers do an excellent job of protecting the face of the display from water intrusion with sealed rubber push buttons. The back is generally not waterproof. They are expecting you to flush mount it into the console or a NavPod. The PowerPod also protects the plastic connectors and wires from deterioration caused by long term exposure to UV.PowerPods for Sail are for mounting on a flat surface. Perhaps under the dodger or aft end of the cockpit table especially on boats with dual wheels.Sizing :Overall Size: 12″H x 13.25″W x 8.5″DUsable Face: 8.375″H x 10.5″W x 5″DMax Cutout: 7.125″H x 10.25″WAll PowerPods IncludeAcrylic capped ABS plasticChromed stainless steel tamper-poof fastenersDouble seal for watertight integrityModels are available pre-cut for popular electronicsSwivel Base with large pass-through for wire harnessThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications:Mounting Style: DashCut/Uncut: CutUPC: 659988108484