These Kover Keepers secure your chartplotter/fish finder/graph cover to prevent them from flying off while travelling down the road. This simple design allows for easy installation and adjustments. Sized with enough of bungee, these can easily fit 12" chartplotters and possibly larger. Strap on a Kover Keeper before you travel have piece of mind that your cover will be there when you arrive. Installation Tip: Adjust the tensioner so the length is shorter than needed. Install the side with the tensioner behind the chartplotter first. Then stretch the cord to install the other side and center the flexible badge in the middle of the cover. This helps reduce slippage of the bungee through the tensionser. Want your own logo or message on this? Contact us for details or hit the chat button at the bottom of the page.