Packing List: Includes 1 track,2 ground wheels,2 pulleys,2 heads,2 stoppers,and necessary screws as shown in the picture. All the essential hardware is provided to empower you to reach new heights. (Note: Ladders not included,hardware only). Creative Design: Meticulously engineered to reduce rolling noise and enhance stability. The ladder incorporates a dual roller design,ensuring it stays on track and minimizing the risk of accidents. Double wheel noise reduction and derailment prevention, carbon steel wrought iron load-bearing capacity of 200kg, silent operation, customizable length of 1-8 meters, suitable for attic warehouses and wine cellars, complete accessories and easy installation, only hardware without stairs.