1. Threaded sleeve: robust and durable, designed to resist cracking and tearing during use. Compatible with standard threaded hose connectors. 2. Adapter for pool intake hose: replace the old adapter by twisting or unscrewing it, or, if it is glued, cut it off. Then screw this onto the hose as the pool hose adapter. 3. Pool hose connector: simple, compact design that is highly practical and provides a reliable pool cleaning connection. 4. Joint: easy to connect and disconnect for convenient use. Includes a cuff for the vacuum hose. Use scenarios: - Routine pool cleaning with a suction head: connect directly to the vacuum hose for a secure seal and easy removal. - Replacing a worn or glued pool hose adapter: swap in this adaptor to restore compatibility without complex tools. - Upgrading a maintenance setup: pair with compatible hoses and fittings for improved durability and easier maintenance.