This is the S9256 Digital Servo used with the Futaba GY611 Gyro, FUTM0825. FEATURES: Aluminum case with heat sink to help cool motor Special servo for the GY611. Compatible with Super Narrow Pulse of (760µs) drive. Nylon gears One year warranty INCLUDES: Four rubber grommets to isolate vibration Four brass eyelets Four phillips head self-tapping mounting screws One large servo wheel 35mm in diameter One star shaped (six arms) servo arm 32mm accross One X-shaped servo arm 39mm across One year limited warranty REQUIRES: Radio system using Futaba "J" type connectors SPECS: Dimensions: 1.6 x 0.8 x 1.4" (40 x 20 x 37mm) Weight: 2.0oz (57g) Speed: 0.06 sec/60° @ 4.8V Torque: 47 oz-in (3.4 kg/cm) @ 4.8V Pulse Width: 760µs Frequency: 270Hz COMMENTS: The following parts are available: FUTM3443 FGS9251 COMPLETE SERVO GEAR SET S9251 (with metal final gear) FUTM3502 FGS9251 1/2/3 GEAR SET (without metal final gear) FUTM2030 for ht eservo horn Updated JBM 12/14/05 jxs 9/27/05 ir/jxs updated jpg 5/11/07 jpg 12/9/09