This is the Tower Hobbies System 3000 STS-10J Micro Servo with a Universal, Futaba "J" connector. FEATURES: Compact, lightweight design-ideal for electric airplanes, sailplanes and on-road electric vehicles Strong, dependable gear train Mounts with two screws INCLUDES: One TS-10 micro servo with pre-installed 1" "X" shaped horn One 1½" x 1½" X-shaped servo horn One 1¾" long straight servo horn One 1 3/8" diameter round servo horn Two brass eylets Two mounting screws Two round black rubber servo grommets SPECS: Length: 1.1" (28mm) Width: .5" (13mm) Height: 1.2" (30mm) Transit Speed: .18 sec/60° @ 4.8V .14 sec/60° @ 6V Output Torque: 35 oz-in @ 4.8V 43 oz-in @ 6V Weight: 0.6oz (17g) Length of servo lead: 6" (152mm) Distance between centers of mounting holes: 1.31" (33.27mm) COMMENTS: TOWER servos have a 1 year warranty against defects in materials and workmanship through Hobby Services. For replacement servo horns use FUTM4510 (short) FUTM4511 (long) nmh 10-29-00 ir/jl updt jxs 12/03/09