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″.

Pet Loader 3-Step Height RangesPet Loader 4-Step Height RangesPet Loader 5-Step Height Ranges