Set of five control horns, for control surfaces. Opaque fiberglass material. Precision cut. Mounting surface area on these are idealy suited to models with 3/32 to 1/4" thick control surfaces. These horns have pre-drilled holes correct for 1/32 wire commonly used in park fliers and F3P models. Note: 25mm size includes a backup plate. 5ea/pack. A nice, lightweight, durable product! Upper left hand in photo.