Features Small and Lightweight: This linear rail and block are small in size and lightweight, especially suitable for small equipment. High Accuracy: Adopting 4-point contact design, the linear guide rail can bear load from every direction, and has good strength and high accuracy. Ball Retainer Design: Designed with ball retainer, the linear guide rail allows interchangeability in the case of small precision. Lubrication System: Block has lubrication system; lubrication oil can be easily put into the oil inlet on the side. Widely be Used: Widely used for automatic equipment, precision measuring equipment, and many other machines that need precision linear movement. Specification: Model: LML9H  Slide Track: Linear rail Rail Length: 200mm / 7.87in Rail Width: 9mm / 0.35in Block Width: 20mm / 0.79in Block Thickness: 8mm / 0.31in Overall Thickness: 10mm / 0.39in Material: Bearing steel Weight: 100g / 3.5oz (approx.) Package list: 1 * Linear Guide Rail  1 * Linear Guide Block Package List