the 16.5" L X 22.5" W X 32" H size is pretty small for sugar gliders.
It also does not appear to have a pull out cage pan that can be cleaned daily - and no bottom grate over the bottom of the cage so your gliders would be in the waste and dropped bits of food if the cage bottom is not cleaned daily.
Gliders need lots of open space for jumping - they do not need the ramps between levels so you would probably only need one or at most 2 of the shelves.
It is hard to tell how big the door on the cage is - but it is probably too small to get a glider safe wheel into the cage.
You may want to consider a sturdier cage with large swing out doors like the Brisbane. If you can go larger the Madagascar or Congo cages are also good choices.
http://www.sugar-glider-store.com/brisbane-cage.htmlhttp://www.sugar-glider-store.com/masuglca.htmlhttp://www.sugar-glider-store.com/newstca.html