Made of high-quality material, durable and practical to use DURABLE & STURDY - High-strength industrial tracks and pulleys can easily hold 100 lbs loads; Great for doors 1/2 inch and 1-1/8 inch thickness. Material and forging process ensure safe and reliable performance. Strong and sturdy: Saves space and makes your room look more spacious Suitable for cabinets and other applications Easy to match with your home decor Material: Carbon steel Color: Black Package Contents: 2 * Rollers 2 * End Caps 2 * Floor Guides 4 * Screws with nuts Only the above package content, other items not included Note: Lighting and different displays may cause the color of the item to appear slightly different from the real thing. Measurement allowance is +/- 1-3 cm.