At one end: a conventional piece of piping (with clamps!) to fit on to a ½ inch garden hose with over 3mm-rubber wall thickness (the ‘golden snake’, for example). At the other end: a normal-size connector piece to fit on to ordinary Rehau or plastic nozzles.
Our problem with the ‘golden snake’!
Its unusually thick wall (3.9 mm) means that our usual hose attachments can’t be used: the clamps will be too small. You need the following connector.