Our 3-Step Pet Loaders dog stairs have an extension range from a minimum height of 16″ to a maximum height of 20″. The 4-Step Pet Loader dog stairs has a range from 20″ to a maximum height of 30″. The largest, 5-Step Pet Loader dog stairs, extend from 29″ to a maximum height of 40″.
![PL 3-Step Height Ranges Pet Loader 3-Step Height Ranges](http://petloader.com/wp-content/uploads/2019/08/PL-3-Step-Height-Ranges-e1565201807203.jpg)
![PL 4-Step Height Ranges Pet Loader 4-Step Height Ranges](http://petloader.com/wp-content/uploads/2019/08/PL-4-Step-Height-Ranges-e1565201858600.jpg)
![PL 5-Step Height Ranges Pet Loader 5-Step Height Ranges](http://petloader.com/wp-content/uploads/2019/08/PL-5-Step-Height-Ranges-e1565201872778.jpg)