Features Easy to install:Standard LML9B linear rail. Width is 9mm, Thickness is 8mm. With pre-drilled ⌀3.5mm mounting hole. The mount holes are metric. The spacing is 25mm. This linear rails are supposed to use M3*8mm bolts and T nuts. High Accurancy: Adopting 4-point contact design, it can bear load from every direction, and has good strength and high accuracy. Smooth and Quiet:All of them can easily pass the free fall test at 45° after lubrication. The rails are very smooth. The carriage moves smoothly and quiet, no binding, good quality, nice workmanship. Compared with other brands of rails, it has a longer service life Lubracation Used: Block has lubrication system; lubrication oil can be easily put into the oil inlet on the side. Widel application: Widely used for automatic equipment, precision measuring equipment, and many other machines that need precision linear movement. Specifications: Model: LML9B Type: Slide rail Slide Track: Linear rail Rail Length: 40mm, 55mm, 95mm, 100mm, 150mm, 260mm (Optional) Rail Width: 9mm Material: Bearing steel Block Fixation Method: Locked Weight: 32~112g(approx.) Package Includes: 1 x Linear Guide Rail  1 x Linear Guide Block Note: Please allow small size error due to manual measurement. Thanks for your understanding. Package List