1. For hose adapters, you will receive 4 replacement hose adapters with collars. These adapters are made of high-quality plastic, which is durable and can convert threaded hoses into stylish hoses. The 1.5-inch and 1.25-inch hoses of Intenxpool refer to a pair of serial adapters, 25007. 2. For pool pump adapters - they are suitable for all filtering pumps with a capacity of 4000, 2500, 2000, and 1500 gallons per hour that use threaded hose connections. 3. Easy to install - Hose Adapter A is designed to connect a 1.25-inch hose to a piston valve or a filtering pump. The small end connects to the 1.25-inch hose, and the threaded end connects to a 1.5-inch piston valve or filtering pump. Just screw it on. There's no need to buy other hoses, saving you additional costs. 4. Waterproof and leak-proof - The rubber ring fits tightly around the 1.25-inch hose, forming a tight seal to prevent water leakage.