The image shows a collection of water meters, which are cylindrical devices used to measure the volume of water flowing through a pipe. These meters are typically installed at the end of a water supply line and are used to regulate the flow of water in a household or industrial setting. The water meters in the image appear to be old and worn, with some showing signs of rust and damage. They are stacked together, indicating that they have been used for some time and may need replacement or repair.