This works perfectly for our new puppy  - Comes in one box with (2) boxes of railings inside one big box.  
There are (2) gates, easy to open. Use one set to block a wide open area between open kitchen and family room and the other set to provide safe area in the yard to confine the puppy.  Used regular tent stakes to secure in the yard.   When weather gets warmer will combine both sets to create large outdoor penned area.  White metal.  Great purchase.