The Foam Rail cross bar works with the SLP or Kit 20 poles to create a virtually airtight seal by pushing its foam edge against the plastic and ceiling. Each rail is 5 feet long and is made of strong, lightweight aluminum.
The spring loaded pole holds it in place and it takes just seconds to install with out damaging a thing. You must set up your barrier using the ZipWall® poles placed 8 to 10 feet apart. This makes an incredibly secure and tightly sealed barrier.