These are two Dubro Heavy Duty Adjustable Control Horns
for .91 and larger size aircraft.
Self-adjusting, designed to mount 90° to center line of control
surface
Mounts against angled control surface using no wedges or shims
Two 4mm x 69mm mounting screws
Two 8.5mm nuts
Two 1.4" (37mm) nylon horns
Two nylon links with two securing pins
Eight aluminum spacers
9/64 hex head wrench for mounting screws