These two extra steps allow you to expand the height of your home play gym by 52cm (20.47 inches) to reach 10ft ceilings.
To extend the height of the Spider V2/V3 you would need 2 sets of extension ladders and three for the Spider V2 Max.
You would need 3 extension ladders for the Spider V2/V3 Max and 4 for the Mega Max.
This is a 19" wide ladder extension and thus it is not compatible with the wall-mounted models. This extension ladder only works with the tension-mounted Models, and is not compatible with the wall-mounted units.
Please note, you can not use this extension with a single-standing Model T2/T3. If you have a 10ft ceiling you have to start with a Spider V2 model to ensure safety and stability.