A. It is made of certain materials and is durable and practical. B. Durable and sturdy: The industrial tracks and pulleys with a certain strength can carry a load of about 100 pounds; suitable for doors with a thickness of approximately 1/2 inch and 1 - 1/8 inches. The materials and forging process contribute to a relatively safe and guaranteed service life. C. Sturdy and solid: It saves space and can make your room look more spacious. D. Suitable for cabinets, etc. E. Easy to match: It can suit your home decoration style. F. Material: Carbon steel + G. Color: Black H. Package contents: - 2 rollers - 2 end caps - 2 floor rails - 4 screws with nuts I. Only the above - mentioned package contents are included, and other items are not. J. Note: Light and different displays may cause some slight differences between the color of the item and the actual one. The allowable measurement error is around +/- 1 - 3 cm.