Security screen door bars
The plus that these screen door have is a grille for enhanced security. They provide fresh air without compromising security. The design can be the same as normal screen doors: swinging, sliding or rolling doors.
Outer frame and grille
Usually the frame of the screen door is made from a more resistant material, like stainless steel or aluminum. The protective bars are also made from these materials. These doors usually have more hinges or at least more resistant ones. This will make them more durable and burglar resistant.
The meshes are usually made from more resistant materials, like aluminum meshes. They allow air circulation while keeping insects outside.