Futaba S3001 Servo Standard Ball Bearing.This is a Standard Servo with a Ball Bearing on the output shaft.This has a "J" connector and uses a nylon gears.This servo can produce high-current draw from your batteries.If using NiMH or LiPo batteries, make sure they are capable of delivering sufficient amps.FEATURES:Single Top Ball BearingSame mounting as S148 and S9201 (individual rectangular grommets)3-pole motorINCLUDES:One S3001 Standard ServoOne accessory packageSPECS:Length: 1.6" (41mm)Width: .8" (20mm)Height: 1.4" (35mm)Weight: 1.6 ounces (45.1g)Torque: 44 oz-in at 4.8V 57 oz-in. at 6VTransit: .23 sec./60° at 4.8V .19 sec./60° at 6V