This is a pair of DU-BRO DUB3352 Heavy Duty Dual Control Horns (2).

Features:

Nylon construction
Ideal for large aircraft
Dual arm allows even, in-line movement of the control rod

Includes:

(2) Heavy Duty Dual Control Horns
(2) Support Plates with 8 mounting bolts
(2) 4-40 Heavy Duty Swivel Ball Links

Specs:

Height from base to center of pivot:  1" (25.4mm)