Single guide 2 olives. Material - The stable floor rails are made of high quality metal, which is strong, hard, wear-resistant, durable and has a long service life. The stable floor guides are reliable for long-term use. Installed on the upper part of a sliding door to prevent it from tipping during opening and closing movements. Note: the data are all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received delivery: (according to the main image)