Give your investment the secure mount it deserves with the RAM Mounts Universal D Ball Mount with Short Arm for Fish Finders and Chartplotters. Sporting several different combinations of predrilled holes for supporting a broad array of devices, this RAM fish-finder mount gives your device a secure hold and smooth articulation. The base features a 2.25"-dia. D-size ball, short arm, and 6.25"L x 2"W electronics plate with D-size ball to support your fish finder gimbal bracket. Powder-coated, marine-grade-aluminum construction lets the RAM Mounts Universal D Size Ball Mount with Short Arm for 9"12" Fish Finders and Chartplotters stand up to harsh water conditions, for the ultimate in durability and ease of use. Overall length: 7.325". Weight: 3.2 lbs. RAM Mounts fish Finder mount with unmatched durability and smooth operation Several predrilled hole combinations for wide-ranging device compatibility D-size ball in base, short arm, and electronics plate with D-size ball to support gimbal brackets Power-coated, marine-grade-aluminum construction View the RAM Mounts Kayak and Boat Compatibility Chart.