These "Add-On" Big Water Plates are designed to be installed on top of the shelfs of a Dual Bow mount. These plates connect the top and bottom row shelfs to make your bow mount "Big Water Proof" and prevent any distortion when stuffing waves.  The plates also have wire holes with grommets to keep your graph's wires separate and neat. This helps when you run several of the same brand graphs and when you remove the graphs, you will know what set of wires go to each graph. These plates are made to match the tops of BBT plates that were manufactured from 2021 and later. They are a great addition to your current bow mounts to make your BBT mount "Indestructible". These Plates are made from 1/8" Aircraft Aluminum. 

Dual Stack Tops