Size of the dam: 100 x 3 x 5cm. It can be easily cut to the length you need. The long, flexible design creates all kinds of shapes. The shower barrier and retention system hold the water inside the threshold. Ideal for curbless showers and other areas where water needs to be contained. Customer Note: For product stability , please follow the installation instructions to install the water retention strip. Installation steps and attentions: (1) First, please clean the ground and keep it dry. This step is very important! (2) Next, determine the installation position of the water retaining strip, and then mark it on the ground with a pen. <p >(3)Remove the adhesive tape on the back of the water retaining strip and stick it on the ground according to the previously marked position. (4)Then use glue to fill in the area where the two ends of the tape contact the wall to seal it, and remove excess glue to make the contact smooth. (5) Finally, to prevent it from falls, let it dry within 24 hours and avoid contact with water. Quantity delivered: 1 piece (1 meter, Gray) Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference of light and display, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main image)