All feature two friction-reducing bearings. The TS-170 adds titanium gears to handle its amazing speed and torque. Though just 0.6 ounces, the TS-10 delivers ample muscle for sailplanes and small aircraft. The TS-53 is great for all general uses. For the ultimate in smooth, precise response, go with the TS-69 for general applications. All servos include complete mounting hardware, fuelproof cases and universal connectors compatible with Futaba®, JR®, Hitec®, Airtronics® Z and Tower Hobbies® systems. 1-year limited warranty.