Package List: 2 x 3.33FT ladder track,2 x upper hooks,2 x bottom wheel,2 x track end caps,5 x fastener(No ladder) Premium Material: Engineered with ​​high quality aluminum, this ladder track system is tested to hold up to 350lbs. It also features anti-rust properties, support durable use for years Space-Saving: The telescopic hook on track allows the ladder to be stored upright when not in use, saving space.Our ladder hardware kit features durable nylon wheels at the bottom, making it easy to push and reposition Installation Tips: This ladder hardware track kit fits thickness 13/16''~1-1/4''. The library ladder track installs in sections with joints. We recommend adding a fastener at each joint. Spacing between fastener is flexible - adjust based on your needs 24 Hours Customer Service: The package comes with a comprehensive illustrated manual,and we have a dedicated customer service team. If you have any inquiries regarding installation or specifications,please don't hesitate to let us know ASIN B0FR9F6QBP Color Black Brand Name CEAKIAN Manufacturer CEAKIAN Load Capacity 350 Pounds Material Type Aluminum Maximum Height 79 Inches Included Components 2 x 3.33FT ladder track,2 x upper hooks,2 x bottom wheel,2 x track end caps,5 x fastener(No ladder) Item Dimensions W x H 79 W x 2.75 H Other Special Features of the Product Telescopic