Function: 1. Simple and easy to use. Beautiful design. 2. High accuracy and stable performance. 3. Professional and technical rail and block, strong and durable. 4. Small size, light weight, suitable for most automatic equipment. 5. The slider can move easily and lightly. Specification: Characteristics: Simple and easy to use. Beautiful design. High accuracy and stable performance. Professional and technical rail and block, strong and durable. Small size, light weight, suitable for most automatic equipment. The slider could move easily and lightly. Specification: Material : metal Type: sliding guide Sliding track: Linear guide Accuracy Level: H. Length(Optional): Approx. 250 mm / 9.8 in, 300 mm / 11.8 in, 400 mm / 15.7 in, 500 mm / 19.6 in, 550 mm / 21.6 in Weight: 217-417g Package List: 1 x linear guide 1 x slide block