Description: Industrial-grade standard production makes this set sturdy and durable. Standardized processing makes it very suitable for guide rail positioning. The pre-drilled holes make the guide rail very easy to install. Professional and exquisite workmanship makes it have high precision and good wear resistance. Made of high carbon steel material, it is very durable to use. The length of this rail shaft is 20cm and the diameter is 3cm. The length of the slider is 4cm, the width is 4cm and the height is 2.6cm. It is very suitable for your DIY CNC milling machine and lathe. In the processing shop, unnecessary errors will no longer occur in the lathe. Item Name: SBR12 Rail Slider Set Material: High Carbon Steel Model: SBR12 Color: Silver Color Features: High Precision, Easy to Install, Stable Size Details: Rail Shaft Length: 20cm/7.9" (Approx.) Rail Shaft Diameter: 3cm/1.2" (Approx.) Slider Size: 4cm x 4cm x 2.6cm/1.6" x 1.6" x 1" (Approx.) Notes: 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. Package Includes: 2 x Linear Slides 4 x Sliders