Premium Materials: These pool hose adapters are made of high-quality plastic, wear-resistant and strong, not easy to deform or break, always rust-proof, and can last for a long time, making them the best companion for swimming pools. Applicable diameter: swimming pool hose adapters can be used instead of spiral hoses, suitable for connecting swimming pool hoses, for 38mm and 32mm swimming pool hoses with 2-inch male thread, such as standard filtration systems. Pool adapter A: If you only have a 1.25-inch pool hose connector, but are installing a 1.5-inch piston valve or upgrading to a more powerful filtration pump, this pool adapter A is the ideal solution. Specifications: The swimming pool hose adapters are suitable for all 4000, 2500, 2000 and 1500 gallon/hour filtration pumps with threaded hose connections, please confirm the specifications before purchasing. Wide range of applications: The hose adapters are suitable for filtration system hoses, submersible pumps, swimming pools, pool pumps, filtration pumps, sand filtration systems, or shut-off valves. We recommend using hose clamps where the water hose joins the nozzle.