It depends on the chosen model. We sell barriers from 15cm up to 2 meters high.
Please refer to the number indicated on each Water-Gate dam.
The first 2 numbers correspond to the maximum height of retention, in inches.
For instance: WL-20 is 20 inches high or 50cm.
Thanks to edge ridge at the top of the barrier and to the holding partitions inside, the protection level is adjusted upwards or downwards.