Lowrance 12 & 16 Units (Silver)

Round Base: 3.75" Round (same hole pattern as 2.25" ball RAM)
Bullet Base: 3.75" x 2.1875" Rectangle (2.5" x 1.5" 4-hole pattern)

The overall length/height of our mounts are as follows (measure from the deck to bottom of the gimbal, or the center of the base to the center of the gimbal):

4" arm: 3"-6.5"

6" arm: 7"-8.5"

9" arm: 8"-11.5"

12" arm: 10"-14.5"