Excellent Craftsmanship: Made with accurate design, equipped with fixing screws for convenient installation and replacement. High Strength Metal Gears: Featuring high accuracy and tight tolerances, capable of delivering up to 1kg torque with excellent responsiveness and sensitivity. Easy Installation and Replacement: Allows direct replacement of your plastic parts or damaged components to achieve higher strength and performance. Outstanding Performance: Low energy consumption, high efficiency, fast operating speed, and optimal control state for a stable driving experience. Improved Durability: Constructed with premium aluminum alloy, plastic, providing enhanced durability and reliability for long lasting usage. Item Type: Digital Servo Arm: 21T Suitable for models: for ARA2102 for ARA2106 SPMSSX110 for ARA2104 Due to different batches, there may be differences in product appearance and printed text, which not affect use Colour:B:Black&Red Material:Aluminum alloy + plastic Package Contents: 1 x Digital Servo Arm Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.