Needing Help With Chinchilla Playtime

To whom ever is reading, i was wondering if it is ok to buy a dog playpen that is 48-inches tall to put my chinchilla in to run around when i'm not watching. Before i buy this i was wondering if the bar spacing was to big and my chinchilla would be able to get through. Link to the playpen is below.

http://ift.tt/1QAvqt5