These are Long Servo Horns for the Futaba S3108 sub micro servo. FEATURES: Nylon construction, four point type White in color INCLUDES: (3) Sub Micro Long Servo Horns REQUIRES: Futaba S3108 servo SPECS: Diameter: 1.338" (33.8") COMMENTS: This will also fit the S3109, S3109M, S3110, S3110M, and S3111 servos updt2/02/06kh EEW 5/11/05 ir/jxs