Various models are easy to solve: Suitable for new models of Karcher K2, K3, K4, K5, K7 and Karcher K2. Compatible machines include K2 Universal Version, K2 Cordless, K2 Cordless, K2 Compact, Compact Car and the K2 family, K2 Compact Car, K2 Total Control, K2 Total Control of Cars and Homes * GB, K2 Total Control of Homes, K2 Superior Total Control of Cars and Homes, K2.850. Dual-purpose high pressure hose: the perfect combination of professional Karcher M22 fitting and push-on quick fitting. They have an inner diameter of 0.34 inches (8.7 mm); outer diameter: 0.47 inches (14 mm) and inner diameter: 0.25 inches (6.4 mm); outer diameter: 0.43 inches (11 mm). Flexible and Durable: The high-pressure extension hose features a rubber sleeve for added flexibility, durability, and wear-resistance, and is compatible with Karcher threaded pressure washers. Use: For pressure washers, simply press the trigger gun lock button to instantly connect or release the hose. The flexible hose features an anti-kink design. Clean clogged pipes, drains, and gutters easily and quickly. Note: Karcher K-series pressure washers have many types of hose connectors. When ordering a hose, please carefully check the connection size. This hose is for cold water only.