Dam size: 100 x 3 cm. It can be easily cut to the length you need. The long and flexible design creates all kinds of shapes. The shower barrier and retention system keeps water inside the threshold. Ideal for curbless showers and other areas where water needs to be contained. Please contact us for any questions about the collapsible dam. Suitable place: It is suitable for all positions where water needs to be controlled, sloped or barrier-free shower trays, barrier-free showers and zero transition showers. Customer note: To make the product more stable, please follow the installation instructions to install the water retaining strip. Installation steps and attentions: (1) First, please clean the floor thoroughly and keep it dry. This step is very important! (2) Afterwards, determine the installation position of the water retaining strip, and then mark it on the floor with a pen. (3) Remove the adhesive tape from the back of the water retaining strip and stick it on the floor according to the previously marked position. (4) Then, use glue to fill the area where the two ends of the tape are in contact with the wall to seal it, and remove the excess glue to make the contact smooth. (5) Finally, to prevent it from falling off, let it dry within 24 hours and avoid contact with water.becomeveryrich