Blue Aluminum Clamping Servo Horn 23T JR / Airtronics / KO - Apex RC Products #8001 JR / Airtronics / KO Aluminum Clamping Servo Horn Heavy Duty Clamp 23 Tooth Spline 2 Mounting Positions - 20mm & 24mm (Measured From Hole Center To Hole Center) High Quality CNC Machined Aluminum