New Model - 35kg. cm 7.4V Coreless Stainless Steel Gear Waterproof Digital Servo. High Quality - High reliability, strong adaptability, low noise, smooth operation and long life. Best For - RC car / ship models and any application using waterproof standard servos. High-precision - metal gears with orange oxidized metal shell, strong heatdissipation capacity and exquisite appearance. Dimensions - 1.58 x 0.79 x 1.51 inch (40x20x 38.5 mm)