1、UNIVERSAL COMPATIBILITY: The fish finder mount features a flat surface design with a hex base, you can also drill your own holes to fit your model. Compatible with for Garmin GPSMAP 162 168 175 180 180C, for Garmin ECHOMAP Plus 72cv 73cv 74cy, for Garmin Striker 5 series, for Striker Plus 5cv 7cv, for Lowrance HDS 7 9 12, etc. 2、ACCURATE SIZES: 360° rotating ball mount base is a 360 degree rotating of the mount and bracket, the upper mount is 6.3 inches wide and the sturdy bracket with base is 6.5 inches high. Hex base hole diameter 0.4 inches, rotating ball diameter is 1.8 inches, more stability. 3、DURABLE CONSTRUCTION: Electronic fish finder holder is made of nylon and silicone materials that can withstand exposure to water and provide long lasting performance. Able to withstand outdoor environments and meet the requirements of fishing. Not only can you get a stable view during fish finder, but also rust resistant and can be used for a long time. 4、EASY TO INSTALL: The base and bracket can be disassembled separately, convenient to fix the base on the boat first, and mount the bracket on the base after fixing the fish finder on the flat base. Loosen the switch on the side of the fish finder bracket, adjust the 2 ball rotating joints to meet your desired angle, then tighten the switch. 5、VERSATILE MOUNTING OPTIONS: This fish finder bracket was designed with versatility in mind. You can attach it to your boat, canoe or kayak in a variety of positions. Whether you prefer to mount it on the side, rail, or any other suitable location, it will meet your needs.