SIzes: MAX FEET WHEN OPEN: 3steps x 4fold (12.5ft), 4steps x 4fold (15.5ft.) 5steps x 4 fold (19ft.) multi-function climb ladder with various configurations Foldable design, convenient to use and easy to carry around Great helper for both indoor household use and outdoor activities Safe and compact----black anti-slip rubber sleeve on the bottom of ladder step and stable locking key between two neighboring sections to avoid bumping and friction It is super versatile and multi-function that can be used as step ladder, extension ladder, loft ladder, etc Easy to assemble and store, space-saving design Approved by European Safety Standard EN131 Features 1, high-strength aluminum profiles, a ladder with dual use, both horse and ladder ladder dual use form 2, with a special locking device, safe and portable 3, pedal profile for the tube, stable non-slip 4, suitable for decorating, construction, factories, shopping malls, supermarkets, hotels, home and other indoor operations