This is a dual end ball link from Great Planes. This simplifies a dual aileron setup.
Features:
Ideal for pilots who are flying with just one aileron servo Costs less than a two-servo system, and requires less setup Can also be used for rudder/nose gear linkage
Includes:
One 2-56 Threaded Ball (ball=3.85mm) with tightening nut flange
One Nylon Ball Cup (socket) (not prethreaded)
Two 2-56 Threaded Couplers (Solder Linkage Rods)
One Nut goes under servo are on threaded ball
One Washer goes under servo arm on threaded ball
Requires: Solder, Soldering Iron, 2-56 Pushrods