Short Arm RAM-108-BU:

The RAM-108-BU consists of a adjustable strap clamp base, short double socket arm and 2.5" diameter round base that contains the universal AMPs hole pattern. The strap will accommodate rails from 1" to 2.1" in diameter. Included is a rubber protection strip to help reduce vibration and to prevent scratching of the mounting surface. Overall Height: 6.875"

Medium Arm RAM-108U:

A must for any angler with a bow mount trolling motor, the RAM-108U trolling motor stabilizer consists of a C size 1.5" medium length double socket arm, 2.5" diameter round base that contains the universal AMPS hole pattern, strap hose clamp base, and drill-down 1.5" round plate with C size ball. The strap accommodates rails from 1" to 2.1" in diameter. The trolling motor stabilizer takes the vibration out of your trolling motor while protecting the trolling motor and mounting surface from damage. The maximum allowable distance between the mounting surface on the boat and the lowest point of the trolling motor shaft is 8.75”. Overall Height: 9"

Long Arm RAM-108-DU:

The RAM-108-DU consists of a LONG length double socket arm, 2.5" diameter round base that contains the universal AMPs hole pattern and single strap base. The strap will accommodate rails from 1" to 2.1" in diameter. The trolling motor stabilizer will take every bit of the vibration out of your trolling motor while all the time protecting the head, shaft and mount from damage. A must for any angler with a bow mount trolling motor. Overall Height: 12.5"