This is the Futaba S9257 High Speed Digital Servofor Helicopter Gyro Operation.
				

				FEATURES: For use with the Futaba GY401 (FUTM0807, FUTM0808) and the GY502gyrosEquipped with two ball bearingsOne year limited warranty
				
				

				INCLUDES: Futaba S9257 High Speed Digital Servo with .83" (21mm) diameterround horn, 1.5" (39mm) diameter four-point horn, 1.2" (32mm)diameter six-point horn, mounting hardware, digital servoprecaution sheet and warranty card
				
				

				REQUIRES: Connecting to gyro
				
				

				SPECS:    Dimensions: 1.4 x 0.6 x 1.1" (36 x 15 x 29mm)Weight:  .92oz (26g)Torque: 28 oz-in (2.0 kg-cm) at 4.8VOperating Speed: 0.08 sec/60° at 4.8VLead Length: 7.9" (200mm)
				
				

				COMMENTS: For use only with FM, PCM and HRS systems. Do not use with AM systems