Your Satisfaction is Our Greatest Pursuit. If You Have Any Questions, Please Feel Free to Contact Us, We Will Reply to You Within 24 Hours. Material: Alumialloy Unheight: 4.6M/15 Ft, 5M/16.4 Ft, 5.4M/17.7 Ft, 5.8M/19 Ft, 6.2M/20.3 Ft, 6.6M/21.6 Ft, 7M/23 Ft , 8M/26.2 Ft. Maximum User Weight: 150Kg/330 Lbs Products: Slow-Descending System Allows the Ladder to Be Retracted Safely and Avoids Finger Pinch. Secure the Ladder Closed with the Heavy-Duty Strap and Buckle for Convenient Storage and Transport. Our Telesstyle Ladder with Foldable Design,Very Convenient to Use and Feel Free to Carry Around. Ideal for Home,Office,Cargo,Access to Rooftops and Large Buildings.Great for Painting the Walls,Change Light Bulbs,Clean Windows Interior Decoration and So On.