RAM Mount Yoke Mount Long Arm w/2.5" Round Base [RAM-B-121U-C]RAM Yoke Mount w Ball & Arm Assembly Long Part #: RAM B 121U C Universal glare shield yoke mount with LONG double socket arm and round base adapter that contains the universal AMPs hole pattern. Ideally suited for a day on the wing and yet easily removed for travel in the flight bag. Both strong and light weight, this new clamping base is perfect for numerous electronic devices commonly found in the cockpit. Modular in design, switch out the clamps