Fishfinders and GPS units are too expensive not to protect. The highest risk of damaging your device is when you are taking it to and from the boat. A drop can be devastating and can destroy it before you even get out on the water. Storing it can be just as risky. It can easily get scratched or damaged if you store it improperly, from the weather elements like ice rain or sun or if the little ones get to it inside the house. Protect your investment with the case that provides the highest level of protection. The soft neoprene exterior is water resistant and includes stainless steel zipper clasps to prevent saltwater corrosion. The double sided thick egg crate foam interior has been custom fit for the Garmin series models listed below and actually protects better against drops and shock than most hard cases that allow internal sliding of the unit. A sturdy carry handle offers convenience and ease with a side pocket that will hold your wallet, keys, cash, licenses, etc. Don't take chances with your sonar unit. Choose the case that will give you the best protection possible. Fits most Garmin 9 inch fishfinder gps models. Check dimensions in images for compatibility with your device.