Features Not easy to wear: 300 mm/11.8 inches linear rail carriage is made of bearing steel, which is not easy to wear and rust, and has good impact toughness and fracture toughness. Lubrication system: The linear slide rail adopts the ball cage design, which is convenient for you to interchange when the accuracy is not high. The base of the linear guide rail is equipped with a lubrication system; the side oil inlet can be easily filled with lubricating oil Wide application: Bearing steel linear slide rail is widely used in automation equipment, precision measuring equipment and many other machines that require precision linear motion. Stable structure: 4-point contact adopts 4-point contact design, which can withstand loads in all directions, and the structure is more stable, maintaining high strength and high precision Size: The length of the linear rail carriage is 300 mm/11.8 inches, and the width of the guide rail is 12 mm/0.5 inches. This kind of linear rail and slider is small in size and light in weight, and is especially suitable for small equipment. Features: This linear rail and block are small in size and lightweight, especially suitable for small equipments. Adopting 4-point contact design, it can bear load from every direction, and has good strength and high accuracy. Designed with ball retainer, which allows interchangeability in the case of small precision. Block has lubrication system; lubrication oil can be easily put into the oil inlet on the side. Widely used for automatic equipment, precision measuring equipment, and many other machines that need precision linear movement. Specification: Model: MGN12(linear rail), MGN12B(slide block) Type: Slide rail Slide Track: Linear rail Rail Length: 300mm / 11.8in Rail Width: 12mm / 0.5in Material: Bearing steel Block Fixation Method: Locked Weight: 269g / 9.5oz (approx.) Package List: 1 * Linear Guide Rail 2 * Linear Guide Blocks Note: Please allow small size error due to manual measurement. Thanks for your understanding. Package List