HIGH QUALITY - Professional and technical rail and block, made of Bearing steel with low friction coefficients, strong and durable to use. STABLE PERFORMANCE - the system works beautifully for both slider motion as well as panning, it worked great and had no resistance in the bearings when put on a rail. SUITABLE FOR SMALL EQUIPMENTS - This linear rail and block are small in size and lightweight, especially suitable for small equipments like semiconductor manufacturing equipment, printed circuit boards precision measurement machine and other small linear motion device. CONVENIENT USE - Adopting 4-point contact design, it can bear load from every direction, and has good strength and high accuracy. Slider could easily and lightly move for convenient use. NON-POLLUTION - Linear Guide Block has lubrication system, lubrication oil can be easily put into the oil inlet on the side..Items from Sheng Xinshun's shop