Features: Brand New and High Quality Closed-Loop Control: MKS SERVO57A is a closed-loop set that uses a high-precision position feedback system to achieve closed-loop control and provide high movement accuracy and stability. High Torque: It has a large torque capacity and can maintain stable performance when moving at high speed with changing load to meet power requirements. Simple Installation: Equipped with an adapter card, it's convenient to connect to different types of controllers and circuits, simplifying the installation process. High-Precision Positioning: Through closed-loop control system and position feedback, high-precision positioning and movement control can be achieved, reducing errors and vibrations for more stable and accurate movement effects. Fast Response: With fast response time, the motor speed and position can be quickly adjusted to meet different work requirements and provide faster dynamic responses. Specifications: Material: Metal + Plastic Type: With Screen/Without Screen Notes: 1. Please allow 1-2 cm error due to manual measurement; make sure you don't mind it before ordering. 2. Due to differences between various display screens, the image may not reflect the actual color of the product. What's in the package: 1 set of stepper motor