Made of high quality materials to ensure maximum durability, high performance and stability. Main drain floor drain of the swimming pool is firm and reliable, effectively draining the pool water. Easy to install, can directly replace old and damaged ones, suitable for use in plastic film pools, swimming pools, and hot springs. The design of the main drain cover allows more water to pass through the cover and prevents swimmers from being trapped by strong suction. Perform preventive maintenance on your pool equipment to prepare for the pool season. Note: The data are manual measurement, please allow a 1-3cm error, due to the differences between the light and the display, there will be a certain color difference, the specific received in kind prevail.