Features: Simple and easy to use. Beautifully design. High accurate and stable performance. Professional and technical rail and block, strong and durable. Small size, light weight, suitable for most automatic equipment. Slider could easily and lightly move. Specification: Material: Steel Type: Slide guide rail Slide track: Linear guide rail Accuracy level: H Slide block fixed method: Lock Length: Approx. 100mm or 3.9inch Weight: 35g Package List: 1 x Linear Guide Rail 1 x Slide Block 1,Simple and easy to use. Beautifully design. 2,High accurate and stable performance. 3,Professional and technical rail and block, strong and durable. 4,Small size, light weight, suitable for most automatic equipment. 5,Slider could easily and lightly move. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.