Comes with an Under Deck Plate Patented Reverse Telescopic Design Allows you mount to extend from the deck of the floor to 30 inches in height to always give you the most visible picture Patented Locking collars The locking collars allow you to use your graph at any height up to 3inches by simply tightening the collar with our oversized knobs Double or Single Allows you to mount one to two graphs to your Ultimate mount Oversized Knobs Enables you to adjust your mount with ease in any conditions, even with thick gloves Beatdown Bi-Metal Technology The Ultimate Series represents a mount that is built for convenient use, while built rugged to provide you the most rigid, most versatile mount on the market. With “The Ultimate Double Stack” you are able to stack one to two graphs for the Ultimate experience, while still using the Patented Reverse Telescopic design to allow you to view your graphs from the deck of the boat all the way up 30 inches in height with a twist of a knob. Compatible with Garmin, Humminbird, and Lowrance *Mount does NOT come with mounting hardware!*