Ultimate Racing Aluminum Double Arm Servo Horn (23T - SANWA/KO/JR/AIRTRONICS) (1PC.)

Beach RC says... 

This is an optional Ultimate Racing 23T Aluminum Double Arm Servo Horn, and are intended for use with SANWA/KO/JR/AIRTRONICS servos. There are 18mm between the pivot center and each linkage hole, and are made of black anodized aluminum 7075-T6.