Karcher Universal Hose Connector:

Ergonomically designed universal hose coupling for convenient handling.

Connecting, disconnecting, and repairing made easy – with the practical and ergonomic Kärcher Universal hose connector. The flexible plug system considerably facilitates the watering of small and large gardens and other areas. Because functioning tap adapters and hose connectors are the basis of every good watering system. The Universal hose connector is compatible with the three most common hose diameters and all available hook-and-loop systems.