This waterproof, brushless, steel-geared servo is perfect for Monster Truck and most Scaler and Crawler applications requiring a standard-sized servo. Precision steel gears, quick transit time, enormous torque, and waterproof to IP67 standards (operates for up to 30 minutes in water up to 3 feet deep).Features: Center aluminum with nylon composite top and bottom case Operates directly on 7.4v without the need for an external BEC Precision ball bearings Specifications: Torque @ 7.4v - 40.0kg/555 oz./in. Speed @ 7.4v - 0.11 sec/60 deg Torque @ 8.4v - 45.0kg/624.9 oz./in. Speed @ 8.4v - 0.10 sec/60 deg Weight: 79g / 3.1oz Dimensions L x W x H (mm): 40.6 x 20.7 x 42 Operating Temperature: 14* - 122*F (-10* - 50*C) Running Current (no load): 180mA @6.0V, 220mA @7.4V Stall Current (at locked): 6000mA @6.0V, 7400mA @7.4V Idle Current: 5mA @6.0V, 5mA @7.4V Wire Length: 400 +/- 5mm Output Gear Spline: 25 Tooth Bearings: 2BB Operating Travel: 100* (1000 - 2000 microsecond) Neutral Position: 1500 microsecond Pulse Width Range: 800 - 2200 microsecond second Maximum Travel: Appx 130* (900 - 2100 microsecond second) Refresh Rate: 333 Hz Motor Type: Brushless