The long, flexible design allows for the creation of a variety of shapes. This product is self-adhesive, easy to install, close to the ground, and does not leak. Shower barriers and retaining systems keep water within the threshold. Great for showers without showers and other areas that need to hold water. Brand new and high quality Specification: Material: silicone color: Black Height: 4 cm, Width: 3 cm Length: 200cm Instructions: 1. Wipe off water and dust on the ground. 2. Determine the location of the water retaining strip and mark it on the ground with a pencil. 3. Remove the glue and install the waterproof barrier at the marked location. 4. Seal the rubber strips where both ends of the waterproof strip are in contact with the wall. 5. Apply glue on both sides of the water plug and spread evenly. Packing list: 1 water retaining strip