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The EcoPower WP173 is an aluminum digital micro servo built for high-voltage use on 1/16 and 1/18 scale models, including Traxxas, Axial, Losi, and the Arrma Grom 1/18 platforms. It also works in the Traxxas TRX-4M when paired with the EcoPower CNC-machined aluminum servo mount (ECP-3072), which is sold separately. The servo has a full metal gear train with ball bearings, a waterproof build, and an aluminum case, so it holds up under demanding use. PERFORMANCE: At 6 volts it runs at 0.09 seconds per 60 degrees and produces 123 oz-in of torque. At 8.4 volts it runs at 0.07 seconds per 60 degrees and produces 173 oz-in of torque. The quick response suits racing and precise maneuvers.