This is the Futaba S3305 High Torque, Metal Gear Servo. per Futaba this servo is approved for use with NiCd batteries ONLY!

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:

• Wide usage in cars and boats that require standard size, high torque servos
• Two ball bearings
• 3-pole motor
• Standard Futaba J style connector
• Metal gears
• One year warranty

INCLUDES:
One Futaba S3305 High Torque Metal Gear Servo with 1.5" (39mm) diameter horn, 1.2" (32mm) 6 point horn, 4 eyelets, 4 rubber grommets, and 4 mounting screws

SPECS:
Length: 1.6"   (40mm) not including mounting flanges
Length: 1.9"   (49.5mm) at center of mounting flanges
Width:  0.8"   (20mm) total
Width:  0.39"  (10mm) at center of mounting flanges
Height: 1.5"   (38mm) not including servo horn
Weight: 1.64oz (46.5g)

Speed:
0.25 sec/60° @ 4.8V
0.20 sec/60° @ 6V
Torque: 124 oz-in (8.9 kg-cm) at 6V
99 oz-in (7.1 kg-cm) at 4.8V

COMMENTS:
Gear set FUTM3384 or DTXM3505
Case set FUTM2948
Futaba recommends these for cars and boats.