VEVOR RV Screen Door Protector, Adjusts from 22 to 31.5 inch, Adjustable Door Grille, Easy to Install, Reinforced Breathable Honeycomb Holes, Iron Camper RV Entry Protector for Pet Protection, Black

Hello, this is a retractable screen door, its width adjustment range is 22~31.5in. So it should be suitable for a variety of stair systems.