From Karcher
This accessory kit also contains, in addition to a 12 metre pressure hose, an ergonomical high-pressure gun and a Quick Connect adaptor for the K 2 to K 7. The upgrade set is suitable for all Karcher high-pressure cleaners manufactured since 1992 (except hose reel machines). Key Features Simple separation of the pressure hose from the spray gun and device. The high-pressure hose is easy to manoeuvre, clicking quickly in and out of the device and gun. This saves time and effort. With Quick Connect adaptors for quick attachment. For ergonomical working.