Foam Rails add an extra level of dust-containment by providing a seal along the entire ceiling. Used with SLP or Kit 20 poles, Foam Rails press the sheeting against the ceiling. No tape or staples are needed so there is no damage to repair. Each FR2 package contains two 5-foot Foam Rails and two T-clip adaptors. To use the Foam Rail, simply remove the head assembly from an SLP pole or the jack of a Kit 20 pole and snap on a T-clip adaptor. Then squeeze the T-clip to open it and insert the Foam Rail. Raise the Foam Rail to the ceiling. Repeat this with additional poles and until you have a continuous seal along the ceiling. Foam Rails are also ideal for use with dropped ceilings. Simply press them against the grid and follow it until the area is contained. ZipWall is a registered trademark of ZipWall LLC.