Loading... Please wait...The GWS S689 2BB MG is a heavy-duty giant-size servo that features metal gears and two ball bearings and can deliver a tremendous amount of torque without sacrificing speed. This servo is a replacement for, and upgrade over, the older GWS S666N 2BB MG. This GWS servo comes with a JR-style connector, mounting hardware, and an assortment of servo horns.