Set of two control horns for control surfaces, aileron, flaps, elevator or rudder. Black nylon material. Mounting surface area on these are ideally suited to models with 3/32 to 1/4" thick control surfaces. Horn is mounted on 5-40 threaded bolt for adjustment of throw or surface travel. Includes diagram of installation instructions. Use on 25 to 60 size models. SKU Number: DUB493