Feature: 1. Programmable: The RC gear servo has built in programmable PWM digital amplifier and 32 bit MCU with 14 bit magnetic encoder. 2. Aluminium Alloy: The RC gear servo are diamond cut aluminum radiator shell, and double ball bearings support the output shaft. 3. Feature: This RC servo steering engine features high accurate helical gear, wide working voltage DC6‑8.4V, premium coreless motor. 4. Waterproof: This RC gear servo replacement is IP67 waterproof and has high performance and it is applicable to RC remote control vehicle, robot, mechanical arm, etc. 5. Delivery: The shipment includes a servo, a metal steering gear arm, two plastic steering gear arms, four screw cartridges, four rubber pads, and seven screws. Specification: Item Type: RC Gear Servo Shell Material: Aluminium alloy Gross Weight: 119g/4.2oz Color: Black Product Size: 40x20x38mm/1.6x0.79x1.5in Working Voltage: 6V-8.4V Operating Speed: 0.18 seconds/60 degree at 6.0V 0.16s/60 degree at 7.4V 0.14s/60 degree at 8.4V Stall Torque: 48.0kg-cm at 6.0V 56.0kg-cm at 7.4V 60.0kg-cm at 8.4V Connector Plug: JR plug Pulse Width: 500-2500usec Deadband: 2usec Application: RC remote control vehicle, robot, mechanical arm, etc . Package List: 1 x RC Gear Servo1 x Metal Servo Arm2 x Plastic Servo Arm 4 x Screw Cartridge 4 x Rubber Pad 7 x Screw