The ZipWall ZR1 ZipRail Commercial Dust Containment Accessory is a great way to create a dust-tight seal along the floor and ceiling without the need for tape or ladders. The ZipRail only takes a minute to install, prevents fine dust creeping over and under standard plastic sheeting and is perfect for dry wall work and concrete restoration for remodeling, as well as flood and fire restoration. The span of the ZipRail is 4-Feet of ceiling and floor per ZipRail seal with a maximum height of 10-Feet 3-Inch. The ZipRail accessory has (3) components: a spring-loaded pole with a ball joint at both ends, plus (2) 4-Feet roam rail crossbars. The accessory fits between the spring-loaded poles and pushes the plastic sheeting tight to the ceiling and the floor. When assembled, the ZipRail seal resembles a large "I-beam". The ZipWall ZR1 ZipRail Commercial Dust Containment Accessory comes with a 1-year warranty towards any defect in workmanship or materials.