Sullivan 8-32 Heavy Duty 1/4 Aileron Horn This is Sullivan's Giant Scale Super Horn. Suitable for all control surfaces on all R/C airplanes. FEATURES Works with any size airframe, but ideal for 1/4 scale applications. Horn is adjustable for control throw and has a .750" (19mm) offset (the largest available) to permit mounting well away from hinge line. INCLUDES One Sullivan Giant Scale Super Horn with 4-40 Gold-N-Clevis, 4-40 stud, 8-32 screw, glass filled nylon horn, anodized aluminum base, and retaining clip. REQUIREMENTS Fastening screw and base to control surface, threading horn to base, and connecting 4-40 control rod (not included) to clevis.