Feature:1. DURABLE MATERIAL: Metal gear servo is made of premium plastic, steel and aluminum alloy material, which is stronger and more durable.2. REPLACEABLE: RC servo is easy to operate and easy to use, just follow the operating instructions and you can simply replace it.3. APPLICABLE MODELS: Digital servo is suitable for Wltoys 284131 1/28 RC cars, please check your model before you buy.4. UPGRADE PARTS: RC digital servo upgrade design, replace the original plastic gear servo, more robust and durable.5. STABLE PERFORMANCE: Metal servo has stable performance, quick response, strong anti interference ability, low noise and fast heat dissipation.Specification:Item Type: Metal Gear ServoMaterial: Shell: Plastic, Gear: Steel, Servo Arm: Aluminum AlloyColor: BlackNumber of Teeth: 28TProduct Size: Approx. 30x11.3x24mm / 1.2x0.4x0.9in (without Cable)Applicable: for WLtoys 284131 1/28 RC Car.Package List:1 x Metal Gear Servo1 x Servo Arm3 x Steering Seat Set Parts2 x Screws1 x Ball HeadNote:All data are measured manually, and there are certain errors in the measurement results.