https://amzn.to/2PUkJte Nozzle in video
https://amzn.to/3b2gz9O If your hose leaks at the hose side use these
https://amzn.to/3eS9ABp Fireman's high pressure sprayer (kids love it)

Orbit spray nozzles are cheaply made and cost about seven dollars at Amazon Home Depot and Lowe’s. Every once in a while the Oring will slip out of place and you can easily fix it by undoing the screw removing the selector and refitting the Oring into its original position.

These orbit nozzles are the main player in the hose industry. There's not many to choose from when going to home depot, lowes or other hardware stores. Orbit spray nozzles are made in china so repairing them is often not practical, in addition orbit does not offer the oring mentioned in this video