-Garden hose quick connect fittings are made of solid brass. Heavy-duty brass construction with rust proof, no-leak. -Easy Off-And-On adapter connection allows you to connect and disconnect with no effort. Just a few seconds to install it. Quick and easy connections to faucet, hose, and hose end accessories. -Standard US 3/4 inch thread, easy to used for garden hoses, watering device pressure washer, faucets, lawn sprinkler, water nozzle. -Includes 3 pieces external thread female quick connectors, 3 pieces internal thread male adapters.