The Everbilt 12-piece waterproofing kit consists of (1) mixing valve collar, (1) pipe collar, (6) inside corners, and (4) outside corners. All of the Everbilt waterproofing components in this kit are made of lightweight, polyethylene material for use under tile and stone surfaces in showers and wet area applications, and prevents moisture from penetrating deep into walls and floors. Thus, this waterproofing kit provides excellent watertight seals, is 100% waterproof, and top rated for steam shower applications. All of the Everbilt waterproofing componenets in this kit offer convenience and provide peace of mind knowing every inside corner is safe from water infiltration, preventing leaks and mold growth. This Everbilt waterproofig kit is easy to install with modified or non-modified thin-set mortar and ready for tile immediately. This kit is ideal for ensuring that the shower is fully waterproof.