This is a Hardware package for Hi-Tec Micro Servos. FEATURES: Plastic, rubber, and brass construction. INCLUDES: Two black T-shaped servo mounts. Two black rubber dampners Two brass eyelets. Two servo mounting screws (phillips head) One white straight horn. One white servo wheel. One white cross horn. REQUIRES: Assembly on servo. SPECS: Length of straight arm: 29.0mm (1.14") Overall length of cross arm: 23.0mm (.91") Diameter of wheel: 17.0mm (.67") Inside diameter of spline: 6.0mm (.24") COMMENTS: This will work with any Hi-Tec servo with the proper spline.