Compatible.The cleaning hose does not fit the old Karcher k2 model, which is the new model. Suitable for Karcher K series (K2-K7) pressure washers with an M22 adapter fitting for quickly connecting and separating the pressure washer and the gun.Easy to Use.On one side of the high pressure hose is the professional Karcher-style M22 adapter for immediate connection to the pressure washer. On the other side is a Karcher-style bayonet fitting that allows you to quickly insert the trigger gun and release the hose by pressing the yellow (not black) button on the trigger gun.Flexible and Durable.The high pressure extension hose is very flexible, with a durable rubber coating, resistant to abrasion and sunlight, and is compatible with Karcher threaded pressure washers. Pressure washer hoses are made of high-strength steel braid with rubber coating.Wide Range of Applications.The flexible hose with anti-kink protection easily and quickly cleans clogged pipes, drains and gutters, and can also be used for rinsing floors, unblocking drains, downspouts or blocked toilets, etc.