Mount your fish finder for convenient access using the RAM 6.25 x 2 Base with Short Arm Mount. The 2.25-dia., D-size ball gives it the extra heft to support large devices. A 6.25 x 2 marine-electronics-plate comes with pre-drilled holes and is a direct fit for 9-12 fish-finder gimbal brackets. Compatible with devices such as the Lowrance HDS-9 Gen2 Touch, Garmin GPSMAP 7407 and more. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Base W/Short Arm.