See: AMain Hobbies

ProTek RC have introduced two powerful high-voltage, metal gear digital servos in the form of the 155T and 155S. The ProTek 155T High Voltage Hi-Torque servo delivers an incredible 360 oz-in of torque and 0.10 transit speed at 6.0V, and when you bump the voltage to 7.4 the spec’s increase to 453 oz-in and 0.08. Spec’s like these make this servo an excellent choice for any 1/10 to 1/8 scale vehicle application. Other features include a full aluminum case that provides bomb proof durability and improved heat dissipation, a metal gear train that is supported by dual ball bearings, a 200mm long 22awg connector wire with gold plated connectors, a coreless motor and Conformal Coated circuit board for excellent vibration absorption and element protection (not waterproof).

The ProTek R/C 155S High Voltage Hi-Speed servo delivers lighting fast 0.08 transit speed and 308 oz-in of torque at 6.0V, and when you bump the voltage to 7.4 the spec’s increase to 0.06 and 370 oz-in! Spec’s like these make this servo an excellent choice for any 1/10 to 1/8 scale vehicle application. Other features include a full aluminum case that provides bomb proof durability and improved heat dissipation, a metal gear train that is supported by dual ball bearings, a 200mm long 22awg connector wire with gold plated connectors, a coreless motor and a Conformal Coated circuit boad.

The ProTek R/C 155 series is the first to introduce the use of a Conformal Coating: a thin layer of polymeric film that contours to the printed circuit board to protect against vibrations, moisture, dust, chemicals and extreme temperatures. With the application of Conformal Coating, the 155 series is ready for battle. Plus, instead of a cheap plastic servo horn, ProTek R/C goes the extra mile with an included aluminum single arm servo horn that will stand up to a majority of the punishment you can throw at it.