Bushfire Shutters Bal 12.5
http://zionxvli610.angelfire.com/index.blog/1694094/the-ultimate-cheat-sheet-on-alfresco-exterior-shutters/
They can obstruct as well as come to be an annoyance if they are near your door take care of when you are trying ahead in and out, they are less likely to hinder of the joint.